51846718518 has 32 divisors (see below), whose sum is σ = 131674206720. Its totient is φ = 14813348040.

The previous prime is 51846718501. The next prime is 51846718543. The reversal of 51846718518 is 81581764815.

51846718518 is a `hidden beast` number, since 5 + 18 + 46 + 71 + 8 + 518 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68579938 + ... + 68580693.

It is an arithmetic number, because the mean of its divisors is an integer number (4114818960).

Almost surely, 2^51846718518 is an apocalyptic number.

51846718518 is an abundant number, since it is smaller than the sum of its proper divisors (79827488202).

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

51846718518 is a wasteful number, since it uses less digits than its factorization.

51846718518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137160649 (or 137160643 counting only the distinct ones).

The product of its digits is 2150400, while the sum is 54.

The spelling of 51846718518 in words is "fifty-one billion, eight hundred forty-six million, seven hundred eighteen thousand, five hundred eighteen".