2638268043340 has 48 divisors (see below), whose sum is σ = 5558193950400. Its totient is φ = 1051914336512.

The previous prime is 2638268043319. The next prime is 2638268043379. The reversal of 2638268043340 is 433408628362.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12020262 + ... + 12237778.

It is an arithmetic number, because the mean of its divisors is an integer number (115795707300).

Almost surely, 2^{2638268043340} is an apocalyptic number.

2638268043340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2638268043340 is an abundant number, since it is smaller than the sum of its proper divisors (2919925907060).

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

2638268043340 is a wasteful number, since it uses less digits than its factorization.

2638268043340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219474 (or 219472 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 49.

The spelling of 2638268043340 in words is "two trillion, six hundred thirty-eight billion, two hundred sixty-eight million, forty-three thousand, three hundred forty".