40391810819262 has 160 divisors (see below), whose sum is σ = 108112359370752. Its totient is φ = 11020565673216.

The previous prime is 40391810819237. The next prime is 40391810819279. The reversal of 40391810819262 is 26291801819304.

It is a happy number.

40391810819262 is a `hidden beast` number, since 4 + 0 + 391 + 8 + 1 + 0 + 8 + 192 + 62 = 666.

40391810819262 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 40391810819199 and 40391810819208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 14556118 + ... + 17107430.

Almost surely, 2^{40391810819262} is an apocalyptic number.

40391810819262 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 40391810819262, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54056179685376).

40391810819262 is an abundant number, since it is smaller than the sum of its proper divisors (67720548551490).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40391810819262 is a wasteful number, since it uses less digits than its factorization.

40391810819262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551964 (or 2551955 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The spelling of 40391810819262 in words is "forty trillion, three hundred ninety-one billion, eight hundred ten million, eight hundred nineteen thousand, two hundred sixty-two".