65557505764 has 9 divisors (see below), whose sum is σ = 114726531241. Its totient is φ = 32778496840.

The previous prime is 65557505743. The next prime is 65557505801. The reversal of 65557505764 is 46750575556.

The square root of 65557505764 is 256042.

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

It can be written as a sum of positive squares in only one way, i.e., 5061184164 + 60496321600 = 71142^2 + 245960^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 448074 + ... + 576094.

Almost surely, 2^65557505764 is an apocalyptic number.

65557505764 is the 256042-nd square number.

It is an amenable number.

65557505764 is a deficient number, since it is larger than the sum of its proper divisors (49169025477).

65557505764 is an frugal number, since it uses more digits than its factorization.

65557505764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256046 (or 128023 counting only the distinct ones).

The product of its (nonzero) digits is 22050000, while the sum is 55.

The spelling of 65557505764 in words is "sixty-five billion, five hundred fifty-seven million, five hundred five thousand, seven hundred sixty-four".