74640004425 has 72 divisors (see below), whose sum is σ = 152859769920. Its totient is φ = 34104873600.

The previous prime is 74640004421. The next prime is 74640004441. The reversal of 74640004425 is 52440004647.

74640004425 is a `hidden beast` number, since 7 + 4 + 640 + 0 + 0 + 4 + 4 + 2 + 5 = 666.

It is not a de Polignac number, because 74640004425 - 2² = 74640004421 is a prime.

It is a super-2 number, since 2×74640004425² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 74640004425.

It is not an unprimeable number, because it can be changed into a prime (74640004421) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3673795 + ... + 3694055.

It is an arithmetic number, because the mean of its divisors is an integer number (2123052360).

Almost surely, 2^74640004425 is an apocalyptic number.

74640004425 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

74640004425 is an abundant number, since it is smaller than the sum of its proper divisors (78219765495).

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

74640004425 is a wasteful number, since it uses less digits than its factorization.

74640004425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22623 (or 22615 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 36.

The spelling of 74640004425 in words is "seventy-four billion, six hundred forty million, four thousand, four hundred twenty-five".