51275236455 has 24 divisors (see below), whose sum is σ = 88893906192. Its totient is φ = 27341614464.

The previous prime is 51275236393. The next prime is 51275236471. The reversal of 51275236455 is 55463257215.

It is a happy number.

51275236455 is a `hidden beast` number, since 5 + 12 + 7 + 523 + 64 + 55 = 666.

51275236455 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 51275236455 - 2¹⁴ = 51275220071 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 51275236455.

It is a congruent number.

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, 138592 + ... + 348938.

It is an arithmetic number, because the mean of its divisors is an integer number (3703912758).

Almost surely, 2^51275236455 is an apocalyptic number.

51275236455 is a deficient number, since it is larger than the sum of its proper divisors (37618669737).

51275236455 is a wasteful number, since it uses less digits than its factorization.

51275236455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215775 (or 215772 counting only the distinct ones).

The product of its digits is 1260000, while the sum is 45.

The spelling of 51275236455 in words is "fifty-one billion, two hundred seventy-five million, two hundred thirty-six thousand, four hundred fifty-five".