55380679561 has 27 divisors (see below), whose sum is σ = 59845869909. Its totient is φ = 51238147968.

The previous prime is 55380679553. The next prime is 55380679567. The reversal of 55380679561 is 16597608355.

The square root of 55380679561 is 235331.

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

55380679561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 12632636025 + 42748043536 = 112395^2 + 206756^2 .

It is not a de Polignac number, because 55380679561 - 2³ = 55380679553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55380679567) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 436068280 + ... + 436068406.

Almost surely, 2^55380679561 is an apocalyptic number.

55380679561 is the 235331-st square number.

55380679561 is the 117666-th centered octagonal number.

It is an amenable number.

55380679561 is a deficient number, since it is larger than the sum of its proper divisors (4465190348).

55380679561 is an equidigital number, since it uses as much as digits as its factorization.

55380679561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 55.

The spelling of 55380679561 in words is "fifty-five billion, three hundred eighty million, six hundred seventy-nine thousand, five hundred sixty-one".