51337508837 has 4 divisors (see below), whose sum is σ = 54357362316. Its totient is φ = 48317655360.

The previous prime is 51337508821. The next prime is 51337508839. The reversal of 51337508837 is 73880573315.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17257025956 + 34080482881 = 131366^2 + 184609^2 .

It is a cyclic number.

It is not a de Polignac number, because 51337508837 - 2⁴ = 51337508821 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 (51337508839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1509926714 + ... + 1509926747.

It is an arithmetic number, because the mean of its divisors is an integer number (13589340579).

Almost surely, 2^51337508837 is an apocalyptic number.

It is an amenable number.

51337508837 is a deficient number, since it is larger than the sum of its proper divisors (3019853479).

51337508837 is a wasteful number, since it uses less digits than its factorization.

51337508837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3019853478.

The product of its (nonzero) digits is 2116800, while the sum is 50.

The spelling of 51337508837 in words is "fifty-one billion, three hundred thirty-seven million, five hundred eight thousand, eight hundred thirty-seven".