65624978313 has 12 divisors (see below), whose sum is σ = 99780669040. Its totient is φ = 41447354616.

The previous prime is 65624978281. The next prime is 65624978339. The reversal of 65624978313 is 31387942656.

65624978313 is a `hidden beast` number, since 6 + 5 + 62 + 497 + 83 + 13 = 666.

It is not a de Polignac number, because 65624978313 - 2⁵ = 65624978281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65624978313.

It is not an unprimeable number, because it can be changed into a prime (65624988313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 191885731 + ... + 191886072.

Almost surely, 2^65624978313 is an apocalyptic number.

It is an amenable number.

65624978313 is a deficient number, since it is larger than the sum of its proper divisors (34155690727).

65624978313 is a wasteful number, since it uses less digits than its factorization.

65624978313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383771828 (or 383771825 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The spelling of 65624978313 in words is "sixty-five billion, six hundred twenty-four million, nine hundred seventy-eight thousand, three hundred thirteen".