51978530807 has 6 divisors (see below), whose sum is σ = 60464821608. Its totient is φ = 44553026364.

The previous prime is 51978530803. The next prime is 51978530827. The reversal of 51978530807 is 70803587915.

It is a happy number.

It is not a de Polignac number, because 51978530807 - 2² = 51978530803 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51978530803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 530393123 + ... + 530393220.

It is an arithmetic number, because the mean of its divisors is an integer number (10077470268).

Almost surely, 2^51978530807 is an apocalyptic number.

51978530807 is a deficient number, since it is larger than the sum of its proper divisors (8486290801).

51978530807 is a wasteful number, since it uses less digits than its factorization.

51978530807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060786357 (or 1060786350 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 53.

The spelling of 51978530807 in words is "fifty-one billion, nine hundred seventy-eight million, five hundred thirty thousand, eight hundred seven".