74578720256 has 40 divisors (see below), whose sum is σ = 153039163200. Its totient is φ = 36281530368.

The previous prime is 74578720253. The next prime is 74578720259. The reversal of 74578720256 is 65202787547.

It is an interprime number because it is at equal distance from previous prime (74578720253) and next prime (74578720259).

It is a junction number, because it is equal to n+sod(n) for n = 74578720198 and 74578720207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74578720253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1949456 + ... + 1987343.

It is an arithmetic number, because the mean of its divisors is an integer number (3825979080).

Almost surely, 2^74578720256 is an apocalyptic number.

It is an amenable number.

74578720256 is an abundant number, since it is smaller than the sum of its proper divisors (78460442944).

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

74578720256 is an equidigital number, since it uses as much as digits as its factorization.

74578720256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3936854 (or 3936838 counting only the distinct ones).

The product of its (nonzero) digits is 6585600, while the sum is 53.

The spelling of 74578720256 in words is "seventy-four billion, five hundred seventy-eight million, seven hundred twenty thousand, two hundred fifty-six".