51618539316 has 24 divisors (see below), whose sum is σ = 120484072800. Its totient is φ = 17200349152.

The previous prime is 51618539303. The next prime is 51618539333. The reversal of 51618539316 is 61393581615.

It is a super-2 number, since 2×51618539316² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 691866 + ... + 762833.

It is an arithmetic number, because the mean of its divisors is an integer number (5020169700).

Almost surely, 2^51618539316 is an apocalyptic number.

It is an amenable number.

51618539316 is an abundant number, since it is smaller than the sum of its proper divisors (68865533484).

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

51618539316 is a wasteful number, since it uses less digits than its factorization.

51618539316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457663 (or 1457661 counting only the distinct ones).

The product of its digits is 583200, while the sum is 48.

The spelling of 51618539316 in words is "fifty-one billion, six hundred eighteen million, five hundred thirty-nine thousand, three hundred sixteen".