64257658855 has 48 divisors (see below), whose sum is σ = 90469419264. Its totient is φ = 43503713280.

The previous prime is 64257658847. The next prime is 64257658877. The reversal of 64257658855 is 55885675246.

It is not a de Polignac number, because 64257658855 - 2³ = 64257658847 is a prime.

It is a super-2 number, since 2×64257658855² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64257658793 and 64257658802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 683247 + ... + 771583.

It is an arithmetic number, because the mean of its divisors is an integer number (1884779568).

Almost surely, 2^64257658855 is an apocalyptic number.

64257658855 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

64257658855 is a deficient number, since it is larger than the sum of its proper divisors (26211760409).

64257658855 is a wasteful number, since it uses less digits than its factorization.

64257658855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88424 (or 88405 counting only the distinct ones).

The product of its digits is 80640000, while the sum is 61.

The spelling of 64257658855 in words is "sixty-four billion, two hundred fifty-seven million, six hundred fifty-eight thousand, eight hundred fifty-five".