64577261225 has 24 divisors (see below), whose sum is σ = 84800027808. Its totient is φ = 48614918400.

The previous prime is 64577261197. The next prime is 64577261251. The reversal of 64577261225 is 52216277546.

64577261225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64577261225 - 2¹⁰ = 64577260201 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64577261225.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4570622 + ... + 4584728.

It is an arithmetic number, because the mean of its divisors is an integer number (3533334492).

Almost surely, 2^64577261225 is an apocalyptic number.

It is an amenable number.

64577261225 is a deficient number, since it is larger than the sum of its proper divisors (20222766583).

64577261225 is a wasteful number, since it uses less digits than its factorization.

64577261225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24905 (or 24900 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 47.

The spelling of 64577261225 in words is "sixty-four billion, five hundred seventy-seven million, two hundred sixty-one thousand, two hundred twenty-five".