64974519801 has 9 divisors (see below), whose sum is σ = 93853188741. Its totient is φ = 43315836732.

The previous prime is 64974519793. The next prime is 64974519803. The reversal of 64974519801 is 10891547946.

The square root of 64974519801 is 254901.

It is a perfect power (a square), and thus also a powerful number.

64974519801 is a `hidden beast` number, since 6 + 49 + 7 + 4 + 519 + 80 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 64974519801 - 2³ = 64974519793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64974519803) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 722220 + ... + 807186.

Almost surely, 2^64974519801 is an apocalyptic number.

64974519801 is the 254901-st square number.

64974519801 is the 127451-st centered octagonal number.

It is an amenable number.

64974519801 is a deficient number, since it is larger than the sum of its proper divisors (28878668940).

64974519801 is an frugal number, since it uses more digits than its factorization.

64974519801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169940 (or 84970 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 64974519801 in words is "sixty-four billion, nine hundred seventy-four million, five hundred nineteen thousand, eight hundred one".