138791433530 has 16 divisors (see below), whose sum is σ = 250944873984. Its totient is φ = 55267619280.

The previous prime is 138791433499. The next prime is 138791433553. The reversal of 138791433530 is 35334197831.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31116926 + ... + 31121385.

It is an arithmetic number, because the mean of its divisors is an integer number (15684054624).

Almost surely, 2^138791433530 is an apocalyptic number.

138791433530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138791433530 is a deficient number, since it is larger than the sum of its proper divisors (112153440454).

138791433530 is a wasteful number, since it uses less digits than its factorization.

138791433530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62238541.

The product of its (nonzero) digits is 816480, while the sum is 47.

The spelling of 138791433530 in words is "one hundred thirty-eight billion, seven hundred ninety-one million, four hundred thirty-three thousand, five hundred thirty".