253864507671 has 16 divisors (see below), whose sum is σ = 377483384320. Its totient is φ = 168618487320.

The previous prime is 253864507649. The next prime is 253864507691. The reversal of 253864507671 is 176705468352.

253864507671 is a `hidden beast` number, since 2 + 5 + 3 + 8 + 64 + 507 + 6 + 71 = 666.

It is not a de Polignac number, because 253864507671 - 2⁵ = 253864507639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253864507691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17340265 + ... + 17354898.

It is an arithmetic number, because the mean of its divisors is an integer number (23592711520).

Almost surely, 2^253864507671 is an apocalyptic number.

253864507671 is a deficient number, since it is larger than the sum of its proper divisors (123618876649).

253864507671 is a wasteful number, since it uses less digits than its factorization.

253864507671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34695443 (or 34695437 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 54.

The spelling of 253864507671 in words is "two hundred fifty-three billion, eight hundred sixty-four million, five hundred seven thousand, six hundred seventy-one".