137680656680 has 48 divisors (see below), whose sum is σ = 360358050420. Its totient is φ = 47204795904.

The previous prime is 137680656671. The next prime is 137680656721. The reversal of 137680656680 is 86656086731.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 131814015844 + 5866640836 = 363062^2 + 76594^2 .

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35120657 + ... + 35124576.

Almost surely, 2^137680656680 is an apocalyptic number.

137680656680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

137680656680 is an abundant number, since it is smaller than the sum of its proper divisors (222677393740).

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

137680656680 is a wasteful number, since it uses less digits than its factorization.

137680656680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70245258 (or 70245247 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 137680656680 in words is "one hundred thirty-seven billion, six hundred eighty million, six hundred fifty-six thousand, six hundred eighty".