40801720784 has 60 divisors (see below), whose sum is σ = 87578061312. Its totient is φ = 18400092480.

The previous prime is 40801720763. The next prime is 40801720811. The reversal of 40801720784 is 48702710804.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162899 + ... + 328845.

Almost surely, 2^40801720784 is an apocalyptic number.

40801720784 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40801720784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43789030656).

40801720784 is an abundant number, since it is smaller than the sum of its proper divisors (46776340528).

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

40801720784 is a wasteful number, since it uses less digits than its factorization.

40801720784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166104 (or 166087 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 41.

The spelling of 40801720784 in words is "forty billion, eight hundred one million, seven hundred twenty thousand, seven hundred eighty-four".