137950343581 has 16 divisors (see below), whose sum is σ = 154284825600. Its totient is φ = 123002080704.

The previous prime is 137950343579. The next prime is 137950343611. The reversal of 137950343581 is 185343059731.

137950343581 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 137950343581 - 2¹ = 137950343579 is a prime.

It is a super-2 number, since 2×137950343581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137950343521) 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 15 ways as a sum of consecutive naturals, for example, 645565 + ... + 832258.

It is an arithmetic number, because the mean of its divisors is an integer number (9642801600).

Almost surely, 2^137950343581 is an apocalyptic number.

It is an amenable number.

137950343581 is a deficient number, since it is larger than the sum of its proper divisors (16334482019).

137950343581 is an equidigital number, since it uses as much as digits as its factorization.

137950343581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477893 (or 1477859 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 49.

The spelling of 137950343581 in words is "one hundred thirty-seven billion, nine hundred fifty million, three hundred forty-three thousand, five hundred eighty-one".