138026490634 has 8 divisors (see below), whose sum is σ = 207050950980. Its totient is φ = 69009506976.

The previous prime is 138026490631. The next prime is 138026490683. The reversal of 138026490634 is 436094620831.

It can be written as a sum of positive squares in 2 ways, for example, as 117406966609 + 20619524025 = 342647^2 + 143595^2 .

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

It is not an unprimeable number, because it can be changed into a prime (138026490631) 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, 1822789 + ... + 1897000.

Almost surely, 2^138026490634 is an apocalyptic number.

138026490634 is a deficient number, since it is larger than the sum of its proper divisors (69024460346).

138026490634 is a wasteful number, since it uses less digits than its factorization.

138026490634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3738344.

The product of its (nonzero) digits is 746496, while the sum is 46.

The spelling of 138026490634 in words is "one hundred thirty-eight billion, twenty-six million, four hundred ninety thousand, six hundred thirty-four".