137720756724 has 48 divisors (see below), whose sum is σ = 335381182080. Its totient is φ = 43902967680.

The previous prime is 137720756717. The next prime is 137720756731. The reversal of 137720756724 is 427657027731.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (137720756717) and next prime (137720756731).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1577334 + ... + 1662354.

It is an arithmetic number, because the mean of its divisors is an integer number (6987107960).

Almost surely, 2^137720756724 is an apocalyptic number.

It is an amenable number.

137720756724 is an abundant number, since it is smaller than the sum of its proper divisors (197660425356).

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

137720756724 is a wasteful number, since it uses less digits than its factorization.

137720756724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90920 (or 90918 counting only the distinct ones).

The product of its (nonzero) digits is 3457440, while the sum is 51.

The spelling of 137720756724 in words is "one hundred thirty-seven billion, seven hundred twenty million, seven hundred fifty-six thousand, seven hundred twenty-four".