51139280137 has 16 divisors (see below), whose sum is σ = 57959815680. Its totient is φ = 44694428800.

The previous prime is 51139280123. The next prime is 51139280209. The reversal of 51139280137 is 73108293115.

51139280137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51139280137 - 2⁷ = 51139280009 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 51139280137.

It is not an unprimeable number, because it can be changed into a prime (51139280737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269689 + ... + 418342.

It is an arithmetic number, because the mean of its divisors is an integer number (3622488480).

Almost surely, 2^51139280137 is an apocalyptic number.

It is an amenable number.

51139280137 is a deficient number, since it is larger than the sum of its proper divisors (6820535543).

51139280137 is a wasteful number, since it uses less digits than its factorization.

51139280137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688304.

The product of its (nonzero) digits is 45360, while the sum is 40.

The spelling of 51139280137 in words is "fifty-one billion, one hundred thirty-nine million, two hundred eighty thousand, one hundred thirty-seven".