1387638902764 has 12 divisors (see below), whose sum is σ = 2429572044424. Its totient is φ = 693475461504.

The previous prime is 1387638902693. The next prime is 1387638902777. The reversal of 1387638902764 is 4672098367831.

It is a junction number, because it is equal to n+sod(n) for n = 1387638902696 and 1387638902705.

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, 85988394 + ... + 86004529.

Almost surely, 2^{1387638902764} is an apocalyptic number.

It is an amenable number.

1387638902764 is a deficient number, since it is larger than the sum of its proper divisors (1041933141660).

1387638902764 is a wasteful number, since it uses less digits than its factorization.

1387638902764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171994944 (or 171994942 counting only the distinct ones).

The product of its (nonzero) digits is 73156608, while the sum is 64.

The spelling of 1387638902764 in words is "one trillion, three hundred eighty-seven billion, six hundred thirty-eight million, nine hundred two thousand, seven hundred sixty-four".