54421072161 has 4 divisors (see below), whose sum is σ = 72561429552. Its totient is φ = 36280714772.

The previous prime is 54421072151. The next prime is 54421072177. The reversal of 54421072161 is 16127012445.

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 54421072161 - 2⁷ = 54421072033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54421072141) 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, 9070178691 + ... + 9070178696.

It is an arithmetic number, because the mean of its divisors is an integer number (18140357388).

Almost surely, 2^54421072161 is an apocalyptic number.

It is an amenable number.

54421072161 is a deficient number, since it is larger than the sum of its proper divisors (18140357391).

54421072161 is a wasteful number, since it uses less digits than its factorization.

54421072161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18140357390.

The product of its (nonzero) digits is 13440, while the sum is 33.

The spelling of 54421072161 in words is "fifty-four billion, four hundred twenty-one million, seventy-two thousand, one hundred sixty-one".