51269340663 has 12 divisors (see below), whose sum is σ = 76798518888. Its totient is φ = 34179560280.

The previous prime is 51269340659. The next prime is 51269340679. The reversal of 51269340663 is 36604396215.

51269340663 is a `hidden beast` number, since 512 + 6 + 93 + 40 + 6 + 6 + 3 = 666.

It is not a de Polignac number, because 51269340663 - 2² = 51269340659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51269340653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105492228 + ... + 105492713.

It is an arithmetic number, because the mean of its divisors is an integer number (6399876574).

Almost surely, 2^51269340663 is an apocalyptic number.

51269340663 is a deficient number, since it is larger than the sum of its proper divisors (25529178225).

51269340663 is an equidigital number, since it uses as much as digits as its factorization.

51269340663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210984956 (or 210984944 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 45.

The spelling of 51269340663 in words is "fifty-one billion, two hundred sixty-nine million, three hundred forty thousand, six hundred sixty-three".