55464644561 has 16 divisors (see below), whose sum is σ = 58639963200. Its totient is φ = 52315357248.

The previous prime is 55464644537. The next prime is 55464644563. The reversal of 55464644561 is 16544646455.

It is a cyclic number.

It is not a de Polignac number, because 55464644561 - 2⁶ = 55464644497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55464644563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5313095 + ... + 5323523.

It is an arithmetic number, because the mean of its divisors is an integer number (3664997700).

Almost surely, 2^55464644561 is an apocalyptic number.

It is an amenable number.

55464644561 is a deficient number, since it is larger than the sum of its proper divisors (3175318639).

55464644561 is a wasteful number, since it uses less digits than its factorization.

55464644561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11648.

The product of its digits is 6912000, while the sum is 50.

The spelling of 55464644561 in words is "fifty-five billion, four hundred sixty-four million, six hundred forty-four thousand, five hundred sixty-one".