54665634561 has 16 divisors (see below), whose sum is σ = 75846693120. Its totient is φ = 34992896400.

The previous prime is 54665634539. The next prime is 54665634563. The reversal of 54665634561 is 16543656645.

It is not a de Polignac number, because 54665634561 - 2²⁶ = 54598525697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54665634563) 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, 3583615 + ... + 3598836.

It is an arithmetic number, because the mean of its divisors is an integer number (4740418320).

Almost surely, 2^54665634561 is an apocalyptic number.

It is an amenable number.

54665634561 is a deficient number, since it is larger than the sum of its proper divisors (21181058559).

54665634561 is a wasteful number, since it uses less digits than its factorization.

54665634561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7182556.

The product of its digits is 7776000, while the sum is 51.

The spelling of 54665634561 in words is "fifty-four billion, six hundred sixty-five million, six hundred thirty-four thousand, five hundred sixty-one".