138857007941 has 4 divisors (see below), whose sum is σ = 138858856032. Its totient is φ = 138855159852.

The previous prime is 138857007907. The next prime is 138857007977. The reversal of 138857007941 is 149700758831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138857007941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138857007041) 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, 806345 + ... + 963278.

It is an arithmetic number, because the mean of its divisors is an integer number (34714714008).

Almost surely, 2^138857007941 is an apocalyptic number.

It is an amenable number.

138857007941 is a deficient number, since it is larger than the sum of its proper divisors (1848091).

138857007941 is an equidigital number, since it uses as much as digits as its factorization.

138857007941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848090.

The product of its (nonzero) digits is 1693440, while the sum is 53.

The spelling of 138857007941 in words is "one hundred thirty-eight billion, eight hundred fifty-seven million, seven thousand, nine hundred forty-one".