51393777207 has 16 divisors (see below), whose sum is σ = 69538487040. Its totient is φ = 33756464000.

The previous prime is 51393777181. The next prime is 51393777209. The reversal of 51393777207 is 70277739315.

It is a cyclic number.

It is not a de Polignac number, because 51393777207 - 2¹² = 51393773111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51393777207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51393777209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225919 + ... + 392207.

It is an arithmetic number, because the mean of its divisors is an integer number (4346155440).

Almost surely, 2^51393777207 is an apocalyptic number.

51393777207 is a deficient number, since it is larger than the sum of its proper divisors (18144709833).

51393777207 is a wasteful number, since it uses less digits than its factorization.

51393777207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167814.

The product of its (nonzero) digits is 1944810, while the sum is 51.

The spelling of 51393777207 in words is "fifty-one billion, three hundred ninety-three million, seven hundred seventy-seven thousand, two hundred seven".