64455501231 has 48 divisors (see below), whose sum is σ = 107475144192. Its totient is φ = 36839140800.

The previous prime is 64455501217. The next prime is 64455501233. The reversal of 64455501231 is 13210555446.

64455501231 is a `hidden beast` number, since 64 + 4 + 5 + 550 + 12 + 31 = 666.

It is not a de Polignac number, because 64455501231 - 2⁶ = 64455501167 is a prime.

It is a super-2 number, since 2×64455501231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64455501233) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37680 + ... + 361013.

It is an arithmetic number, because the mean of its divisors is an integer number (2239065504).

Almost surely, 2^64455501231 is an apocalyptic number.

64455501231 is a deficient number, since it is larger than the sum of its proper divisors (43019642961).

64455501231 is a wasteful number, since it uses less digits than its factorization.

64455501231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398804 (or 398801 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 64455501231 in words is "sixty-four billion, four hundred fifty-five million, five hundred one thousand, two hundred thirty-one".