51165456413 has 8 divisors (see below), whose sum is σ = 51896991960. Its totient is φ = 50438687040.

The previous prime is 51165456373. The next prime is 51165456467. The reversal of 51165456413 is 31465456115.

It can be written as a sum of positive squares in 4 ways, for example, as 42616234969 + 8549221444 = 206437^2 + 92462^2 .

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 51165456413 - 2²⁰ = 51164407837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51165456613) 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, 1169918 + ... + 1212863.

It is an arithmetic number, because the mean of its divisors is an integer number (6487123995).

Almost surely, 2^51165456413 is an apocalyptic number.

It is an amenable number.

51165456413 is a deficient number, since it is larger than the sum of its proper divisors (731535547).

51165456413 is a wasteful number, since it uses less digits than its factorization.

51165456413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2383087.

The product of its digits is 216000, while the sum is 41.

The spelling of 51165456413 in words is "fifty-one billion, one hundred sixty-five million, four hundred fifty-six thousand, four hundred thirteen".