51110680018 has 24 divisors (see below), whose sum is σ = 79501099860. Its totient is φ = 24642965760.

The previous prime is 51110680001. The next prime is 51110680069. The reversal of 51110680018 is 81008601115.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 25444397169 + 25666282849 = 159513^2 + 160207^2 .

It is a super-2 number, since 2×51110680018² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1341958 + ... + 1379518.

Almost surely, 2^51110680018 is an apocalyptic number.

51110680018 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

51110680018 is a deficient number, since it is larger than the sum of its proper divisors (28390419842).

51110680018 is a wasteful number, since it uses less digits than its factorization.

51110680018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38430 (or 38401 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 31.

The spelling of 51110680018 in words is "fifty-one billion, one hundred ten million, six hundred eighty thousand, eighteen".