51281265279 has 16 divisors (see below), whose sum is σ = 69673219200. Its totient is φ = 33538561056.

The previous prime is 51281265271. The next prime is 51281265281. The reversal of 51281265279 is 97256218215.

It is not a de Polignac number, because 51281265279 - 2³ = 51281265271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51281265271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2108812 + ... + 2132990.

It is an arithmetic number, because the mean of its divisors is an integer number (4354576200).

Almost surely, 2^51281265279 is an apocalyptic number.

51281265279 is a deficient number, since it is larger than the sum of its proper divisors (18391953921).

51281265279 is a wasteful number, since it uses less digits than its factorization.

51281265279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37574.

The product of its digits is 604800, while the sum is 48.

The spelling of 51281265279 in words is "fifty-one billion, two hundred eighty-one million, two hundred sixty-five thousand, two hundred seventy-nine".