51920299841 has 8 divisors (see below), whose sum is σ = 52141681320. Its totient is φ = 51699068928.

The previous prime is 51920299817. The next prime is 51920299927. The reversal of 51920299841 is 14899202915.

It can be written as a sum of positive squares in 4 ways, for example, as 18932659216 + 32987640625 = 137596^2 + 181625^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51920299841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51920299841.

It is not an unprimeable number, because it can be changed into a prime (51920299801) 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, 682715 + ... + 754943.

It is an arithmetic number, because the mean of its divisors is an integer number (6517710165).

Almost surely, 2^51920299841 is an apocalyptic number.

It is an amenable number.

51920299841 is a deficient number, since it is larger than the sum of its proper divisors (221381479).

51920299841 is a wasteful number, since it uses less digits than its factorization.

51920299841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75283.

The product of its (nonzero) digits is 466560, while the sum is 50.

The spelling of 51920299841 in words is "fifty-one billion, nine hundred twenty million, two hundred ninety-nine thousand, eight hundred forty-one".