64905130927656 has 24 divisors (see below), whose sum is σ = 175784729595930. Its totient is φ = 21635043642528.

The previous prime is 64905130927643. The next prime is 64905130927657. The reversal of 64905130927656 is 65672903150946.

64905130927656 is a `hidden beast` number, since 6 + 4 + 9 + 0 + 5 + 1 + 309 + 276 + 56 = 666.

It can be written as a sum of positive squares in only one way, i.e., 48471755411556 + 16433375516100 = 6962166^2 + 4053810^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×64905130927656² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64905130927593 and 64905130927602.

It is not an unprimeable number, because it can be changed into a prime (64905130927657) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 450730075815 + ... + 450730075958.

Almost surely, 2^{64905130927656} is an apocalyptic number.

It is an amenable number.

64905130927656 is an abundant number, since it is smaller than the sum of its proper divisors (110879598668274).

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

64905130927656 is a wasteful number, since it uses less digits than its factorization.

64905130927656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901460151785 (or 901460151778 counting only the distinct ones).

The product of its (nonzero) digits is 73483200, while the sum is 63.

The spelling of 64905130927656 in words is "sixty-four trillion, nine hundred five billion, one hundred thirty million, nine hundred twenty-seven thousand, six hundred fifty-six".