138912449403 has 24 divisors (see below), whose sum is σ = 232029589008. Its totient is φ = 73272499776.

The previous prime is 138912449381. The next prime is 138912449407. The reversal of 138912449403 is 304944219831.

It is not a de Polignac number, because 138912449403 - 2¹² = 138912445307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138912449407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36343576 + ... + 36347397.

It is an arithmetic number, because the mean of its divisors is an integer number (9667899542).

Almost surely, 2^138912449403 is an apocalyptic number.

138912449403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

138912449403 is a deficient number, since it is larger than the sum of its proper divisors (93117139605).

138912449403 is a wasteful number, since it uses less digits than its factorization.

138912449403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72691003 (or 72690996 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 48.

The spelling of 138912449403 in words is "one hundred thirty-eight billion, nine hundred twelve million, four hundred forty-nine thousand, four hundred three".