138237331610 has 32 divisors (see below), whose sum is σ = 287305643520. Its totient is φ = 46907039232.

The previous prime is 138237331541. The next prime is 138237331667. The reversal of 138237331610 is 16133732831.

It is a happy 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, 10172690 + ... + 10186269.

It is an arithmetic number, because the mean of its divisors is an integer number (8978301360).

Almost surely, 2^138237331610 is an apocalyptic number.

138237331610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138237331610 is an abundant number, since it is smaller than the sum of its proper divisors (149068311910).

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

138237331610 is a wasteful number, since it uses less digits than its factorization.

138237331610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20359070.

The product of its (nonzero) digits is 54432, while the sum is 38.

The spelling of 138237331610 in words is "one hundred thirty-eight billion, two hundred thirty-seven million, three hundred thirty-one thousand, six hundred ten".