64172496627538 has 64 divisors (see below), whose sum is σ = 110300714858880. Its totient is φ = 27755927424000.

The previous prime is 64172496627527. The next prime is 64172496627559. The reversal of 64172496627538 is 83572669427146.

It is a super-2 number, since 2×64172496627538² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (70) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53844906 + ... + 55023802.

It is an arithmetic number, because the mean of its divisors is an integer number (1723448669670).

Almost surely, 2^{64172496627538} is an apocalyptic number.

64172496627538 is a deficient number, since it is larger than the sum of its proper divisors (46128218231342).

64172496627538 is a wasteful number, since it uses less digits than its factorization.

64172496627538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180123.

The product of its digits is 731566080, while the sum is 70.

The spelling of 64172496627538 in words is "sixty-four trillion, one hundred seventy-two billion, four hundred ninety-six million, six hundred twenty-seven thousand, five hundred thirty-eight".