51442561163 has 24 divisors (see below), whose sum is σ = 60305598720. Its totient is φ = 43752214800.

The previous prime is 51442561127. The next prime is 51442561201. The reversal of 51442561163 is 36116524415.

It is not a de Polignac number, because 51442561163 - 2⁸ = 51442560907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51442561063) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7536170 + ... + 7542992.

It is an arithmetic number, because the mean of its divisors is an integer number (2512733280).

Almost surely, 2^51442561163 is an apocalyptic number.

51442561163 is a deficient number, since it is larger than the sum of its proper divisors (8863037557).

51442561163 is a wasteful number, since it uses less digits than its factorization.

51442561163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8007 (or 8000 counting only the distinct ones).

The product of its digits is 86400, while the sum is 38.

The spelling of 51442561163 in words is "fifty-one billion, four hundred forty-two million, five hundred sixty-one thousand, one hundred sixty-three".