137888939557 has 4 divisors (see below), whose sum is σ = 137895411276. Its totient is φ = 137882467840.

The previous prime is 137888939521. The next prime is 137888939599. The reversal of 137888939557 is 755939888731.

It is a Cunningham number, because it is equal to 371334²+1.

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 9244053316 + 128644886241 = 96146^2 + 358671^2 .

It is a cyclic number.

It is not a de Polignac number, because 137888939557 - 2¹¹ = 137888937509 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 137888939557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137888936557) 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, 3203794 + ... + 3246547.

It is an arithmetic number, because the mean of its divisors is an integer number (34473852819).

Almost surely, 2^137888939557 is an apocalyptic number.

It is an amenable number.

137888939557 is a deficient number, since it is larger than the sum of its proper divisors (6471719).

137888939557 is an equidigital number, since it uses as much as digits as its factorization.

137888939557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6471718.

The product of its digits is 457228800, while the sum is 73.

The spelling of 137888939557 in words is "one hundred thirty-seven billion, eight hundred eighty-eight million, nine hundred thirty-nine thousand, five hundred fifty-seven".