136991831740 has 12 divisors (see below), whose sum is σ = 287682846696. Its totient is φ = 54796732688.

The previous prime is 136991831737. The next prime is 136991831759. The reversal of 136991831740 is 47138199631.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3424795774 + ... + 3424795813.

It is an arithmetic number, because the mean of its divisors is an integer number (23973570558).

Almost surely, 2^136991831740 is an apocalyptic number.

136991831740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136991831740 is an abundant number, since it is smaller than the sum of its proper divisors (150691014956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

136991831740 is a wasteful number, since it uses less digits than its factorization.

136991831740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6849591596 (or 6849591594 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 52.

The spelling of 136991831740 in words is "one hundred thirty-six billion, nine hundred ninety-one million, eight hundred thirty-one thousand, seven hundred forty".