54195658561 has 4 divisors (see below), whose sum is σ = 59122536624. Its totient is φ = 49268780500.

The previous prime is 54195658549. The next prime is 54195658633. The reversal of 54195658561 is 16585659145.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 54195658561 - 2⁵ = 54195658529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54195658541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2463439015 + ... + 2463439036.

It is an arithmetic number, because the mean of its divisors is an integer number (14780634156).

Almost surely, 2^54195658561 is an apocalyptic number.

It is an amenable number.

54195658561 is a deficient number, since it is larger than the sum of its proper divisors (4926878063).

54195658561 is a wasteful number, since it uses less digits than its factorization.

54195658561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4926878062.

The product of its digits is 6480000, while the sum is 55.

The spelling of 54195658561 in words is "fifty-four billion, one hundred ninety-five million, six hundred fifty-eight thousand, five hundred sixty-one".