8138726077640 has 32 divisors (see below), whose sum is σ = 18737997252480. Its totient is φ = 3179781350592.

The previous prime is 8138726077639. The next prime is 8138726077661. The reversal of 8138726077640 is 467706278318.

It is a self number, because there is not a number n which added to its sum of digits gives 8138726077640.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2365907024 + ... + 2365910463.

It is an arithmetic number, because the mean of its divisors is an integer number (585562414140).

Almost surely, 2^{8138726077640} is an apocalyptic number.

It is an amenable number.

8138726077640 is an abundant number, since it is smaller than the sum of its proper divisors (10599271174840).

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

8138726077640 is a wasteful number, since it uses less digits than its factorization.

8138726077640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4731817541 (or 4731817537 counting only the distinct ones).

The product of its (nonzero) digits is 18966528, while the sum is 59.

The spelling of 8138726077640 in words is "eight trillion, one hundred thirty-eight billion, seven hundred twenty-six million, seventy-seven thousand, six hundred forty".