51263620265 has 64 divisors (see below), whose sum is σ = 75734507520. Its totient is φ = 32778197760.

The previous prime is 51263620211. The next prime is 51263620271. The reversal of 51263620265 is 56202636215.

It is not a de Polignac number, because 51263620265 - 2¹² = 51263616169 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3923834 + ... + 3936876.

It is an arithmetic number, because the mean of its divisors is an integer number (1183351680).

Almost surely, 2^51263620265 is an apocalyptic number.

51263620265 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51263620265 is a deficient number, since it is larger than the sum of its proper divisors (24470887255).

51263620265 is a wasteful number, since it uses less digits than its factorization.

51263620265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13334.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 51263620265 in words is "fifty-one billion, two hundred sixty-three million, six hundred twenty thousand, two hundred sixty-five".