138649109692 has 12 divisors (see below), whose sum is σ = 242648110936. Its totient is φ = 69321078000.

The previous prime is 138649109663. The next prime is 138649109693. The reversal of 138649109692 is 296901946831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138649109693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 778434 + ... + 939817.

Almost surely, 2^138649109692 is an apocalyptic number.

It is an amenable number.

138649109692 is a deficient number, since it is larger than the sum of its proper divisors (103999001244).

138649109692 is a wasteful number, since it uses less digits than its factorization.

138649109692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738428 (or 1738426 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 58.

The spelling of 138649109692 in words is "one hundred thirty-eight billion, six hundred forty-nine million, one hundred nine thousand, six hundred ninety-two".