51457489475 has 12 divisors (see below), whose sum is σ = 72922613904. Its totient is φ = 35285135520.

The previous prime is 51457489463. The next prime is 51457489493. The reversal of 51457489475 is 57498475415.

It is a happy number.

It is not a de Polignac number, because 51457489475 - 2⁴ = 51457489459 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147021224 + ... + 147021573.

It is an arithmetic number, because the mean of its divisors is an integer number (6076884492).

Almost surely, 2^51457489475 is an apocalyptic number.

51457489475 is a deficient number, since it is larger than the sum of its proper divisors (21465124429).

51457489475 is a wasteful number, since it uses less digits than its factorization.

51457489475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294042814 (or 294042809 counting only the distinct ones).

The product of its digits is 28224000, while the sum is 59.

The spelling of 51457489475 in words is "fifty-one billion, four hundred fifty-seven million, four hundred eighty-nine thousand, four hundred seventy-five".