64861448464 has 40 divisors (see below), whose sum is σ = 126709751168. Its totient is φ = 32163143040.

The previous prime is 64861448429. The next prime is 64861448479. The reversal of 64861448464 is 46484416846.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1032319 + ... + 1093345.

Almost surely, 2^64861448464 is an apocalyptic number.

It is an amenable number.

64861448464 is a deficient number, since it is larger than the sum of its proper divisors (61848302704).

64861448464 is a wasteful number, since it uses less digits than its factorization.

64861448464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61583 (or 61577 counting only the distinct ones).

The product of its digits is 14155776, while the sum is 55.

The spelling of 64861448464 in words is "sixty-four billion, eight hundred sixty-one million, four hundred forty-eight thousand, four hundred sixty-four".