51037380581 has 16 divisors (see below), whose sum is σ = 58187870208. Its totient is φ = 44311594800.

The previous prime is 51037380557. The next prime is 51037380587. The reversal of 51037380581 is 18508373015.

It is not a de Polignac number, because 51037380581 - 2¹⁰ = 51037379557 is a prime.

It is a super-2 number, since 2×51037380581² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51037380587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7796 + ... + 319586.

It is an arithmetic number, because the mean of its divisors is an integer number (3636741888).

Almost surely, 2^51037380581 is an apocalyptic number.

It is an amenable number.

51037380581 is a deficient number, since it is larger than the sum of its proper divisors (7150489627).

51037380581 is a wasteful number, since it uses less digits than its factorization.

51037380581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312472.

The product of its (nonzero) digits is 100800, while the sum is 41.

The spelling of 51037380581 in words is "fifty-one billion, thirty-seven million, three hundred eighty thousand, five hundred eighty-one".