64572540171 has 16 divisors (see below), whose sum is σ = 86595966240. Its totient is φ = 42799011840.

The previous prime is 64572540169. The next prime is 64572540173. The reversal of 64572540171 is 17104527546.

It is an interprime number because it is at equal distance from previous prime (64572540169) and next prime (64572540173).

It is not a de Polignac number, because 64572540171 - 2¹ = 64572540169 is a prime.

It is a super-2 number, since 2×64572540171² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64572540173) 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, 932941 + ... + 999761.

It is an arithmetic number, because the mean of its divisors is an integer number (5412247890).

Almost surely, 2^64572540171 is an apocalyptic number.

64572540171 is a deficient number, since it is larger than the sum of its proper divisors (22023426069).

64572540171 is a wasteful number, since it uses less digits than its factorization.

64572540171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68686.

The product of its (nonzero) digits is 235200, while the sum is 42.

The spelling of 64572540171 in words is "sixty-four billion, five hundred seventy-two million, five hundred forty thousand, one hundred seventy-one".