56501765401 has 3 divisors (see below), whose sum is σ = 56502003103. Its totient is φ = 56501527700.

The previous prime is 56501765393. The next prime is 56501765407. The reversal of 56501765401 is 10456710565.

The square root of 56501765401 is 237701.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 27390581001 + 29111184400 = 165501^2 + 170620^2 .

It is not a de Polignac number, because 56501765401 - 2³ = 56501765393 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56501765407) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 118851 + ... + 356551.

Almost surely, 2^56501765401 is an apocalyptic number.

56501765401 is the 237701-st square number.

56501765401 is the 118851-st centered octagonal number.

It is an amenable number.

56501765401 is a deficient number, since it is larger than the sum of its proper divisors (237702).

56501765401 is an frugal number, since it uses more digits than its factorization.

56501765401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475402 (or 237701 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 56501765401 in words is "fifty-six billion, five hundred one million, seven hundred sixty-five thousand, four hundred one".