13887762512639 has 4 divisors (see below), whose sum is σ = 13906555155480. Its totient is φ = 13868969869800.

The previous prime is 13887762512629. The next prime is 13887762512671. The reversal of 13887762512639 is 93621526778831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13887762512639 is a prime.

It is a super-2 number, since 2×13887762512639² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13887762512629) 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, 9396320312 + ... + 9396321789.

It is an arithmetic number, because the mean of its divisors is an integer number (3476638788870).

Almost surely, 2^{13887762512639} is an apocalyptic number.

13887762512639 is a deficient number, since it is larger than the sum of its proper divisors (18792642841).

13887762512639 is an equidigital number, since it uses as much as digits as its factorization.

13887762512639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18792642840.

The product of its digits is 182891520, while the sum is 68.

The spelling of 13887762512639 in words is "thirteen trillion, eight hundred eighty-seven billion, seven hundred sixty-two million, five hundred twelve thousand, six hundred thirty-nine".