51406266918 has 16 divisors (see below), whose sum is σ = 108860330160. Its totient is φ = 16127456256.

The previous prime is 51406266893. The next prime is 51406266953. The reversal of 51406266918 is 81966260415.

It is a super-2 number, since 2×51406266918² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251991403 + ... + 251991606.

It is an arithmetic number, because the mean of its divisors is an integer number (6803770635).

Almost surely, 2^51406266918 is an apocalyptic number.

51406266918 is an abundant number, since it is smaller than the sum of its proper divisors (57454063242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51406266918 is a wasteful number, since it uses less digits than its factorization.

51406266918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503983031.

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 51406266918 in words is "fifty-one billion, four hundred six million, two hundred sixty-six thousand, nine hundred eighteen".