51512623155 has 24 divisors (see below), whose sum is σ = 102044054112. Its totient is φ = 23548627584.

The previous prime is 51512623133. The next prime is 51512623171. The reversal of 51512623155 is 55132621515.

51512623155 is a `hidden beast` number, since 5 + 1 + 5 + 12 + 623 + 15 + 5 = 666.

51512623155 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 51512623155 - 2¹⁴ = 51512606771 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81765754 + ... + 81766383.

It is an arithmetic number, because the mean of its divisors is an integer number (4251835588).

Almost surely, 2^51512623155 is an apocalyptic number.

51512623155 is a deficient number, since it is larger than the sum of its proper divisors (50531430957).

51512623155 is a wasteful number, since it uses less digits than its factorization.

51512623155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163532155 (or 163532152 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

The spelling of 51512623155 in words is "fifty-one billion, five hundred twelve million, six hundred twenty-three thousand, one hundred fifty-five".