51265153505 has 16 divisors (see below), whose sum is σ = 65182637520. Its totient is φ = 38572541952.

The previous prime is 51265153463. The next prime is 51265153519. The reversal of 51265153505 is 50535156215.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 11220741184 + 40044412321 = 105928^2 + 200111^2 .

It is not a de Polignac number, because 51265153505 - 2⁶ = 51265153441 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89564 + ... + 332493.

It is an arithmetic number, because the mean of its divisors is an integer number (4073914845).

Almost surely, 2^51265153505 is an apocalyptic number.

It is an amenable number.

51265153505 is a deficient number, since it is larger than the sum of its proper divisors (13917484015).

51265153505 is a wasteful number, since it uses less digits than its factorization.

51265153505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423508.

The product of its (nonzero) digits is 112500, while the sum is 38.

The spelling of 51265153505 in words is "fifty-one billion, two hundred sixty-five million, one hundred fifty-three thousand, five hundred five".