51700534509 has 16 divisors (see below), whose sum is σ = 74243355200. Its totient is φ = 31812846336.

The previous prime is 51700534469. The next prime is 51700534517. The reversal of 51700534509 is 90543500715.

51700534509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51700534509 - 2⁷ = 51700534381 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51700534909) 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, 429237 + ... + 536325.

It is an arithmetic number, because the mean of its divisors is an integer number (4640209700).

Almost surely, 2^51700534509 is an apocalyptic number.

It is an amenable number.

51700534509 is a deficient number, since it is larger than the sum of its proper divisors (22542820691).

51700534509 is a wasteful number, since it uses less digits than its factorization.

51700534509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119484.

The product of its (nonzero) digits is 94500, while the sum is 39.

The spelling of 51700534509 in words is "fifty-one billion, seven hundred million, five hundred thirty-four thousand, five hundred nine".