137687688887 has 4 divisors (see below), whose sum is σ = 157357358736. Its totient is φ = 118018019040.

The previous prime is 137687688877. The next prime is 137687688961. The reversal of 137687688887 is 788886786731.

137687688887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 137687688887 - 2¹² = 137687684791 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 (137687688857) 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 3 ways as a sum of consecutive naturals, for example, 9834834914 + ... + 9834834927.

It is an arithmetic number, because the mean of its divisors is an integer number (39339339684).

Almost surely, 2^137687688887 is an apocalyptic number.

137687688887 is a deficient number, since it is larger than the sum of its proper divisors (19669669849).

137687688887 is an equidigital number, since it uses as much as digits as its factorization.

137687688887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19669669848.

The product of its digits is 1213857792, while the sum is 77.

The spelling of 137687688887 in words is "one hundred thirty-seven billion, six hundred eighty-seven million, six hundred eighty-eight thousand, eight hundred eighty-seven".