51457616258 has 4 divisors (see below), whose sum is σ = 77186424390. Its totient is φ = 25728808128.

The previous prime is 51457616237. The next prime is 51457616263. The reversal of 51457616258 is 85261675415.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 51278243809 + 179372449 = 226447^2 + 13393^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12864404063 + ... + 12864404066.

Almost surely, 2^51457616258 is an apocalyptic number.

51457616258 is a deficient number, since it is larger than the sum of its proper divisors (25728808132).

51457616258 is a wasteful number, since it uses less digits than its factorization.

51457616258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25728808131.

The product of its digits is 2016000, while the sum is 50.

The spelling of 51457616258 in words is "fifty-one billion, four hundred fifty-seven million, six hundred sixteen thousand, two hundred fifty-eight".