138887513762 has 8 divisors (see below), whose sum is σ = 208346833692. Its totient is φ = 69438569200.

The previous prime is 138887513761. The next prime is 138887513771. The reversal of 138887513762 is 267315788831.

It can be written as a sum of positive squares in 2 ways, for example, as 138853862161 + 33651601 = 372631^2 + 5801^2 .

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

It is not an unprimeable number, because it can be changed into a prime (138887513761) 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, 2560289 + ... + 2613972.

Almost surely, 2^138887513762 is an apocalyptic number.

138887513762 is a deficient number, since it is larger than the sum of its proper divisors (69459319930).

138887513762 is a wasteful number, since it uses less digits than its factorization.

138887513762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5187684.

The product of its digits is 13547520, while the sum is 59.

The spelling of 138887513762 in words is "one hundred thirty-eight billion, eight hundred eighty-seven million, five hundred thirteen thousand, seven hundred sixty-two".