51455157498 has 20 divisors (see below), whose sum is σ = 115297668090. Its totient is φ = 17151719112.

The previous prime is 51455157491. The next prime is 51455157499. The reversal of 51455157498 is 89475155415.

51455157498 is a `hidden beast` number, since 5 + 14 + 5 + 51 + 574 + 9 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 28394609049 + 23060548449 = 168507^2 + 151857^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (51455157491) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 158812053 + ... + 158812376.

Almost surely, 2^51455157498 is an apocalyptic number.

51455157498 is an abundant number, since it is smaller than the sum of its proper divisors (63842510592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51455157498 is a wasteful number, since it uses less digits than its factorization.

51455157498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317624443 (or 317624434 counting only the distinct ones).

The product of its digits is 5040000, while the sum is 54.

The spelling of 51455157498 in words is "fifty-one billion, four hundred fifty-five million, one hundred fifty-seven thousand, four hundred ninety-eight".