51191675930 has 32 divisors (see below), whose sum is σ = 93205915920. Its totient is φ = 20241041920.

The previous prime is 51191675917. The next prime is 51191675947. The reversal of 51191675930 is 3957619115.

It can be written as a sum of positive squares in 8 ways, for example, as 17596818409 + 33594857521 = 132653^2 + 183289^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5083100 + ... + 5093160.

Almost surely, 2^51191675930 is an apocalyptic number.

51191675930 is a deficient number, since it is larger than the sum of its proper divisors (42014239990).

51191675930 is a wasteful number, since it uses less digits than its factorization.

51191675930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15874.

The product of its (nonzero) digits is 255150, while the sum is 47.

The spelling of 51191675930 in words is "fifty-one billion, one hundred ninety-one million, six hundred seventy-five thousand, nine hundred thirty".