64157117871 has 48 divisors (see below), whose sum is σ = 109189451520. Its totient is φ = 32553077760.

The previous prime is 64157117863. The next prime is 64157117993. The reversal of 64157117871 is 17871175146.

It is not a de Polignac number, because 64157117871 - 2³ = 64157117863 is a prime.

It is a super-2 number, since 2×64157117871² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64157117871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64157113871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 352015 + ... + 502223.

It is an arithmetic number, because the mean of its divisors is an integer number (2274780240).

Almost surely, 2^64157117871 is an apocalyptic number.

64157117871 is a deficient number, since it is larger than the sum of its proper divisors (45032333649).

64157117871 is a wasteful number, since it uses less digits than its factorization.

64157117871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150316 (or 150273 counting only the distinct ones).

The product of its digits is 329280, while the sum is 48.

The spelling of 64157117871 in words is "sixty-four billion, one hundred fifty-seven million, one hundred seventeen thousand, eight hundred seventy-one".