1387500012639 has 16 divisors (see below), whose sum is σ = 2213675234400. Its totient is φ = 853846161408.

The previous prime is 1387500012637. The next prime is 1387500012649. The reversal of 1387500012639 is 9362100057831.

1387500012639 is a `hidden beast` number, since 1 + 3 + 8 + 7 + 5 + 0 + 0 + 0 + 1 + 2 + 639 = 666.

It is not a de Polignac number, because 1387500012639 - 2¹ = 1387500012637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1387500012594 and 1387500012603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387500012631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1976495394 + ... + 1976496095.

It is an arithmetic number, because the mean of its divisors is an integer number (138354702150).

Almost surely, 2^{1387500012639} is an apocalyptic number.

1387500012639 is a deficient number, since it is larger than the sum of its proper divisors (826175221761).

1387500012639 is a wasteful number, since it uses less digits than its factorization.

1387500012639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3952991511 (or 3952991505 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 1387500012639 in words is "one trillion, three hundred eighty-seven billion, five hundred million, twelve thousand, six hundred thirty-nine".