64538141644604 has 24 divisors (see below), whose sum is σ = 119688205171248. Its totient is φ = 30344775883520.

The previous prime is 64538141644589. The next prime is 64538141644609. The reversal of 64538141644604 is 40644614183546.

It is a self number, because there is not a number n which added to its sum of digits gives 64538141644604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64538141644609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407956307 + ... + 408114474.

It is an arithmetic number, because the mean of its divisors is an integer number (4987008548802).

Almost surely, 2^{64538141644604} is an apocalyptic number.

It is an amenable number.

64538141644604 is a deficient number, since it is larger than the sum of its proper divisors (55150063526644).

64538141644604 is a wasteful number, since it uses less digits than its factorization.

64538141644604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816071965 (or 816071963 counting only the distinct ones).

The product of its (nonzero) digits is 26542080, while the sum is 56.

The spelling of 64538141644604 in words is "sixty-four trillion, five hundred thirty-eight billion, one hundred forty-one million, six hundred forty-four thousand, six hundred four".