51851438457 has 32 divisors (see below), whose sum is σ = 87834378240. Its totient is φ = 26467940160.

The previous prime is 51851438437. The next prime is 51851438459. The reversal of 51851438457 is 75483415815.

51851438457 is nontrivially palindromic in base 6.

It is not a de Polignac number, because 51851438457 - 2⁶ = 51851438393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51851438459) 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, 3054957 + ... + 3071882.

It is an arithmetic number, because the mean of its divisors is an integer number (2744824320).

Almost surely, 2^51851438457 is an apocalyptic number.

It is an amenable number.

51851438457 is a deficient number, since it is larger than the sum of its proper divisors (35982939783).

51851438457 is a wasteful number, since it uses less digits than its factorization.

51851438457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6126893.

The product of its digits is 2688000, while the sum is 51.

The spelling of 51851438457 in words is "fifty-one billion, eight hundred fifty-one million, four hundred thirty-eight thousand, four hundred fifty-seven".