51504711268 has 6 divisors (see below), whose sum is σ = 90133244726. Its totient is φ = 25752355632.

The previous prime is 51504711259. The next prime is 51504711281. The reversal of 51504711268 is 86211740515.

It can be written as a sum of positive squares in only one way, i.e., 29241684004 + 22263027264 = 171002^2 + 149208^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51504711268.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6438088905 + ... + 6438088912.

Almost surely, 2^51504711268 is an apocalyptic number.

It is an amenable number.

51504711268 is a deficient number, since it is larger than the sum of its proper divisors (38628533458).

51504711268 is a wasteful number, since it uses less digits than its factorization.

51504711268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12876177821 (or 12876177819 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 40.

The spelling of 51504711268 in words is "fifty-one billion, five hundred four million, seven hundred eleven thousand, two hundred sixty-eight".