838139581441 has 4 divisors (see below), whose sum is σ = 874580432832. Its totient is φ = 801698730052.

The previous prime is 838139581429. The next prime is 838139581453. The reversal of 838139581441 is 144185931838.

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 an interprime number because it is at equal distance from previous prime (838139581429) and next prime (838139581453).

It is a de Polignac number, because none of the positive numbers 2^k-838139581441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (838139584441) 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, 18220425661 + ... + 18220425706.

It is an arithmetic number, because the mean of its divisors is an integer number (218645108208).

Almost surely, 2^838139581441 is an apocalyptic number.

It is an amenable number.

838139581441 is a deficient number, since it is larger than the sum of its proper divisors (36440851391).

838139581441 is a wasteful number, since it uses less digits than its factorization.

838139581441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36440851390.

The product of its digits is 3317760, while the sum is 55.

The spelling of 838139581441 in words is "eight hundred thirty-eight billion, one hundred thirty-nine million, five hundred eighty-one thousand, four hundred forty-one".