137720085650 has 24 divisors (see below), whose sum is σ = 292753554240. Its totient is φ = 47218314960.

The previous prime is 137720085641. The next prime is 137720085709. The reversal of 137720085650 is 56580027731.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 196742630 + ... + 196743329.

It is an arithmetic number, because the mean of its divisors is an integer number (12198064760).

Almost surely, 2^137720085650 is an apocalyptic number.

137720085650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

137720085650 is an abundant number, since it is smaller than the sum of its proper divisors (155033468590).

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

137720085650 is a wasteful number, since it uses less digits than its factorization.

137720085650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393485978 (or 393485973 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 44.

The spelling of 137720085650 in words is "one hundred thirty-seven billion, seven hundred twenty million, eighty-five thousand, six hundred fifty".