64916427645 has 32 divisors (see below), whose sum is σ = 119386540800. Its totient is φ = 33428227392.

The previous prime is 64916427629. The next prime is 64916427661. The reversal of 64916427645 is 54672461946.

64916427645 is a `hidden beast` number, since 6 + 491 + 6 + 42 + 76 + 45 = 666.

It is an interprime number because it is at equal distance from previous prime (64916427629) and next prime (64916427661).

It is not a de Polignac number, because 64916427645 - 2⁴ = 64916427629 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64916427591 and 64916427600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8286817 + ... + 8294646.

It is an arithmetic number, because the mean of its divisors is an integer number (3730829400).

Almost surely, 2^64916427645 is an apocalyptic number.

It is an amenable number.

64916427645 is a deficient number, since it is larger than the sum of its proper divisors (54470113155).

64916427645 is a wasteful number, since it uses less digits than its factorization.

64916427645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16581506 (or 16581500 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The spelling of 64916427645 in words is "sixty-four billion, nine hundred sixteen million, four hundred twenty-seven thousand, six hundred forty-five".