40251774690 has 80 divisors (see below), whose sum is σ = 108374971320. Its totient is φ = 10719682560.

The previous prime is 40251774649. The next prime is 40251774737. The reversal of 40251774690 is 9647715204.

40251774690 is a `hidden beast` number, since 4 + 0 + 2 + 517 + 7 + 46 + 90 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 17202158649 + 23049616041 = 131157^2 + 151821^2 .

It is a super-2 number, since 2×40251774690² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 590580 + ... + 655200.

Almost surely, 2^40251774690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40251774690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54187485660).

40251774690 is an abundant number, since it is smaller than the sum of its proper divisors (68123196630).

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

40251774690 is a wasteful number, since it uses less digits than its factorization.

40251774690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65409 (or 65400 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 40251774690 in words is "forty billion, two hundred fifty-one million, seven hundred seventy-four thousand, six hundred ninety".