51287438518 has 8 divisors (see below), whose sum is σ = 77858039448. Its totient is φ = 25334758704.

The previous prime is 51287438497. The next prime is 51287438551. The reversal of 51287438518 is 81583478215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154480071 + ... + 154480402.

It is an arithmetic number, because the mean of its divisors is an integer number (9732254931).

Almost surely, 2^51287438518 is an apocalyptic number.

51287438518 is a deficient number, since it is larger than the sum of its proper divisors (26570600930).

51287438518 is a wasteful number, since it uses less digits than its factorization.

51287438518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308960558.

The product of its digits is 2150400, while the sum is 52.

The spelling of 51287438518 in words is "fifty-one billion, two hundred eighty-seven million, four hundred thirty-eight thousand, five hundred eighteen".