51113794087 has 4 divisors (see below), whose sum is σ = 51980129640. Its totient is φ = 50247458536.

The previous prime is 51113794031. The next prime is 51113794169. The reversal of 51113794087 is 78049731115.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51113794087 - 2²⁷ = 50979576359 is a prime.

It is a super-2 number, since 2×51113794087² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51113794027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433167688 + ... + 433167805.

It is an arithmetic number, because the mean of its divisors is an integer number (12995032410).

Almost surely, 2^51113794087 is an apocalyptic number.

51113794087 is a deficient number, since it is larger than the sum of its proper divisors (866335553).

51113794087 is an equidigital number, since it uses as much as digits as its factorization.

51113794087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866335552.

The product of its (nonzero) digits is 211680, while the sum is 46.

The spelling of 51113794087 in words is "fifty-one billion, one hundred thirteen million, seven hundred ninety-four thousand, eighty-seven".