51017121165 has 8 divisors (see below), whose sum is σ = 81627393888. Its totient is φ = 27209131280.

The previous prime is 51017121151. The next prime is 51017121173. The reversal of 51017121165 is 56112171015.

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

It is not a de Polignac number, because 51017121165 - 2⁴ = 51017121149 is a prime.

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, 1700570691 + ... + 1700570720.

It is an arithmetic number, because the mean of its divisors is an integer number (10203424236).

Almost surely, 2^51017121165 is an apocalyptic number.

It is an amenable number.

51017121165 is a deficient number, since it is larger than the sum of its proper divisors (30610272723).

51017121165 is a wasteful number, since it uses less digits than its factorization.

51017121165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3401141419.

The product of its (nonzero) digits is 2100, while the sum is 30.

The spelling of 51017121165 in words is "fifty-one billion, seventeen million, one hundred twenty-one thousand, one hundred sixty-five".