51857498518 has 16 divisors (see below), whose sum is σ = 91301233824. Its totient is φ = 21623976000.

The previous prime is 51857498509. The next prime is 51857498549. The reversal of 51857498518 is 81589475815.

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, 50054983 + ... + 50056018.

It is an arithmetic number, because the mean of its divisors is an integer number (5706327114).

Almost surely, 2^51857498518 is an apocalyptic number.

51857498518 is a deficient number, since it is larger than the sum of its proper divisors (39443735306).

51857498518 is a wasteful number, since it uses less digits than its factorization.

51857498518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100111047.

The product of its digits is 16128000, while the sum is 61.

The spelling of 51857498518 in words is "fifty-one billion, eight hundred fifty-seven million, four hundred ninety-eight thousand, five hundred eighteen".