51474080642 has 16 divisors (see below), whose sum is σ = 79881492600. Its totient is φ = 24847092480.

The previous prime is 51474080617. The next prime is 51474080681. The reversal of 51474080642 is 24608047415.

It is a Cunningham number, because it is equal to 226879²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 26991532681 + 24482547961 = 164291^2 + 156469^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51474080642.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 635834 + ... + 712202.

Almost surely, 2^51474080642 is an apocalyptic number.

51474080642 is a deficient number, since it is larger than the sum of its proper divisors (28407411958).

51474080642 is a wasteful number, since it uses less digits than its factorization.

51474080642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88021.

The product of its (nonzero) digits is 215040, while the sum is 41.

The spelling of 51474080642 in words is "fifty-one billion, four hundred seventy-four million, eighty thousand, six hundred forty-two".