138194634490 has 32 divisors (see below), whose sum is σ = 271485800064. Its totient is φ = 50230040640.

The previous prime is 138194634469. The next prime is 138194634623. The reversal of 138194634490 is 94436491831.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34734 + ... + 526873.

It is an arithmetic number, because the mean of its divisors is an integer number (8483931252).

Almost surely, 2^138194634490 is an apocalyptic number.

138194634490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138194634490 is a deficient number, since it is larger than the sum of its proper divisors (133291165574).

138194634490 is a wasteful number, since it uses less digits than its factorization.

138194634490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563862.

The product of its (nonzero) digits is 2239488, while the sum is 52.

The spelling of 138194634490 in words is "one hundred thirty-eight billion, one hundred ninety-four million, six hundred thirty-four thousand, four hundred ninety".