51426121264557 has 32 divisors (see below), whose sum is σ = 74098943385600. Its totient is φ = 31537107233280.

The previous prime is 51426121264459. The next prime is 51426121264673. The reversal of 51426121264557 is 75546212162415.

It is not a de Polignac number, because 51426121264557 - 2²² = 51426117070253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51426121264957) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21413332 + ... + 23693522.

It is an arithmetic number, because the mean of its divisors is an integer number (2315591980800).

Almost surely, 2^{51426121264557} is an apocalyptic number.

It is an amenable number.

51426121264557 is a deficient number, since it is larger than the sum of its proper divisors (22672822121043).

51426121264557 is a wasteful number, since it uses less digits than its factorization.

51426121264557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2282213.

The product of its digits is 4032000, while the sum is 51.

The spelling of 51426121264557 in words is "fifty-one trillion, four hundred twenty-six billion, one hundred twenty-one million, two hundred sixty-four thousand, five hundred fifty-seven".