138453748643 has 6 divisors (see below), whose sum is σ = 161058442356. Its totient is φ = 118674641652.

The previous prime is 138453748627. The next prime is 138453748649. The reversal of 138453748643 is 346847354831.

It is not a de Polignac number, because 138453748643 - 2⁴ = 138453748627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138453748649) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1412793305 + ... + 1412793402.

It is an arithmetic number, because the mean of its divisors is an integer number (26843073726).

Almost surely, 2^138453748643 is an apocalyptic number.

138453748643 is a deficient number, since it is larger than the sum of its proper divisors (22604693713).

138453748643 is an equidigital number, since it uses as much as digits as its factorization.

138453748643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2825586721 (or 2825586714 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 56.

The spelling of 138453748643 in words is "one hundred thirty-eight billion, four hundred fifty-three million, seven hundred forty-eight thousand, six hundred forty-three".