51698989715 has 8 divisors (see below), whose sum is σ = 62168307840. Its totient is φ = 41272844992.

The previous prime is 51698989711. The next prime is 51698989723. The reversal of 51698989715 is 51798989615.

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

It is a cyclic number.

It is not a de Polignac number, because 51698989715 - 2² = 51698989711 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51698989711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10790714 + ... + 10795503.

It is an arithmetic number, because the mean of its divisors is an integer number (7771038480).

Almost surely, 2^51698989715 is an apocalyptic number.

51698989715 is a deficient number, since it is larger than the sum of its proper divisors (10469318125).

51698989715 is a wasteful number, since it uses less digits than its factorization.

51698989715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21586701.

The product of its digits is 48988800, while the sum is 68.

The spelling of 51698989715 in words is "fifty-one billion, six hundred ninety-eight million, nine hundred eighty-nine thousand, seven hundred fifteen".