51859757157 has 48 divisors (see below), whose sum is σ = 78673512960. Its totient is φ = 30202222464.

The previous prime is 51859757153. The next prime is 51859757177. The reversal of 51859757157 is 75175795815.

It is not a de Polignac number, because 51859757157 - 2² = 51859757153 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 51859757157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51859757153) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23496748 + ... + 23498954.

It is an arithmetic number, because the mean of its divisors is an integer number (1639031520).

Almost surely, 2^51859757157 is an apocalyptic number.

51859757157 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

51859757157 is a deficient number, since it is larger than the sum of its proper divisors (26813755803).

51859757157 is a wasteful number, since it uses less digits than its factorization.

51859757157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3930 (or 3911 counting only the distinct ones).

The product of its digits is 15435000, while the sum is 60.

The spelling of 51859757157 in words is "fifty-one billion, eight hundred fifty-nine million, seven hundred fifty-seven thousand, one hundred fifty-seven".