2638442856192 has 144 divisors (see below), whose sum is σ = 8249746931328. Its totient is φ = 738025943040.

The previous prime is 2638442856191. The next prime is 2638442856293. The reversal of 2638442856192 is 2916582448362.

It is a super-2 number, since 2×2638442856192² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638442856191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11902318 + ... + 12121965.

Almost surely, 2^{2638442856192} is an apocalyptic number.

2638442856192 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2638442856192 is an abundant number, since it is smaller than the sum of its proper divisors (5611304075136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2638442856192 is a wasteful number, since it uses less digits than its factorization.

2638442856192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24024326 (or 24024312 counting only the distinct ones).

The product of its digits is 39813120, while the sum is 60.

The spelling of 2638442856192 in words is "two trillion, six hundred thirty-eight billion, four hundred forty-two million, eight hundred fifty-six thousand, one hundred ninety-two".