51442115565 has 8 divisors (see below), whose sum is σ = 82307384928. Its totient is φ = 27435794960.

The previous prime is 51442115533. The next prime is 51442115579. The reversal of 51442115565 is 56551124415.

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

It is not a de Polignac number, because 51442115565 - 2⁵ = 51442115533 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, 1714737171 + ... + 1714737200.

It is an arithmetic number, because the mean of its divisors is an integer number (10288423116).

Almost surely, 2^51442115565 is an apocalyptic number.

It is an amenable number.

51442115565 is a deficient number, since it is larger than the sum of its proper divisors (30865269363).

51442115565 is a wasteful number, since it uses less digits than its factorization.

51442115565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3429474379.

The product of its digits is 120000, while the sum is 39.

The spelling of 51442115565 in words is "fifty-one billion, four hundred forty-two million, one hundred fifteen thousand, five hundred sixty-five".