137955850921 has 64 divisors (see below), whose sum is σ = 172331200000. Its totient is φ = 110064116736.

The previous prime is 137955850897. The next prime is 137955850931. The reversal of 137955850921 is 129058559731.

It is a happy number.

137955850921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 137955850921 - 2⁵ = 137955850889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137955850931) 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 63 ways as a sum of consecutive naturals, for example, 194577715 + ... + 194578423.

It is an arithmetic number, because the mean of its divisors is an integer number (2692675000).

Almost surely, 2^137955850921 is an apocalyptic number.

It is an amenable number.

137955850921 is a deficient number, since it is larger than the sum of its proper divisors (34375349079).

137955850921 is an equidigital number, since it uses as much as digits as its factorization.

137955850921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231 (or 1217 counting only the distinct ones).

The product of its (nonzero) digits is 3402000, while the sum is 55.

The spelling of 137955850921 in words is "one hundred thirty-seven billion, nine hundred fifty-five million, eight hundred fifty thousand, nine hundred twenty-one".