51538426173 has 64 divisors (see below), whose sum is σ = 85400985600. Its totient is φ = 30514449600.

The previous prime is 51538426129. The next prime is 51538426183. The reversal of 51538426173 is 37162483515.

It is a happy number.

51538426173 is a `hidden beast` number, since 5 + 1 + 5 + 384 + 261 + 7 + 3 = 666.

It is not a de Polignac number, because 51538426173 - 2¹⁴ = 51538409789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51538426123) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 946848 + ... + 999798.

It is an arithmetic number, because the mean of its divisors is an integer number (1334390400).

Almost surely, 2^51538426173 is an apocalyptic number.

It is an amenable number.

51538426173 is a deficient number, since it is larger than the sum of its proper divisors (33862559427).

51538426173 is a wasteful number, since it uses less digits than its factorization.

51538426173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53079 (or 53073 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The spelling of 51538426173 in words is "fifty-one billion, five hundred thirty-eight million, four hundred twenty-six thousand, one hundred seventy-three".