64185506102864 has 10 divisors (see below), whose sum is σ = 124359418074330. Its totient is φ = 32092753051424.

The previous prime is 64185506102863. The next prime is 64185506102909. The reversal of 64185506102864 is 46820160558146.

It can be written as a sum of positive squares in only one way, i.e., 64185414096400 + 92006464 = 8011580^2 + 9592^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64185506102863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2005797065699 + ... + 2005797065730.

It is an arithmetic number, because the mean of its divisors is an integer number (12435941807433).

Almost surely, 2^{64185506102864} is an apocalyptic number.

It is an amenable number.

64185506102864 is a deficient number, since it is larger than the sum of its proper divisors (60173911971466).

64185506102864 is a wasteful number, since it uses less digits than its factorization.

64185506102864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4011594131437 (or 4011594131431 counting only the distinct ones).

The product of its (nonzero) digits is 11059200, while the sum is 56.

The spelling of 64185506102864 in words is "sixty-four trillion, one hundred eighty-five billion, five hundred six million, one hundred two thousand, eight hundred sixty-four".