51507470506 has 8 divisors (see below), whose sum is σ = 77825156580. Its totient is φ = 25565751648.

The previous prime is 51507470473. The next prime is 51507470537. The reversal of 51507470506 is 60507470515.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 49918730625 + 1588739881 = 223425^2 + 39859^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93991461 + ... + 93992008.

Almost surely, 2^51507470506 is an apocalyptic number.

51507470506 is a deficient number, since it is larger than the sum of its proper divisors (26317686074).

51507470506 is a wasteful number, since it uses less digits than its factorization.

51507470506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187983608.

The product of its (nonzero) digits is 147000, while the sum is 40.

Subtracting 51507470506 from its reverse (60507470515), we obtain a palindrome (9000000009).

The spelling of 51507470506 in words is "fifty-one billion, five hundred seven million, four hundred seventy thousand, five hundred six".