2638367139742 has 8 divisors (see below), whose sum is σ = 4016618630856. Its totient is φ = 1299494262792.

The previous prime is 2638367139721. The next prime is 2638367139787. The reversal of 2638367139742 is 2479317638362.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9844653373 + ... + 9844653640.

It is an arithmetic number, because the mean of its divisors is an integer number (502077328857).

Almost surely, 2^{2638367139742} is an apocalyptic number.

2638367139742 is a deficient number, since it is larger than the sum of its proper divisors (1378251491114).

2638367139742 is a wasteful number, since it uses less digits than its factorization.

2638367139742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19689307082.

The product of its digits is 54867456, while the sum is 61.

The spelling of 2638367139742 in words is "two trillion, six hundred thirty-eight billion, three hundred sixty-seven million, one hundred thirty-nine thousand, seven hundred forty-two".