138860969194 has 8 divisors (see below), whose sum is σ = 208293946308. Its totient is φ = 69429653760.

The previous prime is 138860969183. The next prime is 138860969209. The reversal of 138860969194 is 491969068831.

It can be written as a sum of positive squares in 2 ways, for example, as 131591190025 + 7269779169 = 362755^2 + 85263^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179767 + ... + 556810.

Almost surely, 2^138860969194 is an apocalyptic number.

138860969194 is a deficient number, since it is larger than the sum of its proper divisors (69432977114).

138860969194 is an equidigital number, since it uses as much as digits as its factorization.

138860969194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830840.

The product of its (nonzero) digits is 20155392, while the sum is 64.

The spelling of 138860969194 in words is "one hundred thirty-eight billion, eight hundred sixty million, nine hundred sixty-nine thousand, one hundred ninety-four".