64132540123257 has 6 divisors (see below), whose sum is σ = 92635891289162. Its totient is φ = 42755026748832.

The previous prime is 64132540123181. The next prime is 64132540123259. The reversal of 64132540123257 is 75232104523146.

64132540123257 is a `hidden beast` number, since 6 + 4 + 1 + 3 + 2 + 5 + 401 + 232 + 5 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 36900048360681 + 27232491762576 = 6074541^2 + 5218476^2 .

It is not a de Polignac number, because 64132540123257 - 2³⁴ = 64115360254073 is a prime.

It is a super-2 number, since 2×64132540123257² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64132540123259) 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, 3562918895728 + ... + 3562918895745.

Almost surely, 2^{64132540123257} is an apocalyptic number.

It is an amenable number.

64132540123257 is a deficient number, since it is larger than the sum of its proper divisors (28503351165905).

64132540123257 is a wasteful number, since it uses less digits than its factorization.

64132540123257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7125837791479 (or 7125837791476 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 45.

The spelling of 64132540123257 in words is "sixty-four trillion, one hundred thirty-two billion, five hundred forty million, one hundred twenty-three thousand, two hundred fifty-seven".