1387764027765 has 16 divisors (see below), whose sum is σ = 2467136049600. Its totient is φ = 740140814736.

The previous prime is 1387764027733. The next prime is 1387764027787. The reversal of 1387764027765 is 5677204677831.

1387764027765 is a `hidden beast` number, since 1 + 38 + 7 + 76 + 402 + 77 + 65 = 666.

It is not a de Polignac number, because 1387764027765 - 2⁵ = 1387764027733 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5139866635 + ... + 5139866904.

It is an arithmetic number, because the mean of its divisors is an integer number (154196003100).

Almost surely, 2^{1387764027765} is an apocalyptic number.

1387764027765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1387764027765 is a deficient number, since it is larger than the sum of its proper divisors (1079372021835).

1387764027765 is a wasteful number, since it uses less digits than its factorization.

1387764027765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10279733553 (or 10279733547 counting only the distinct ones).

The product of its (nonzero) digits is 82978560, while the sum is 63.

The spelling of 1387764027765 in words is "one trillion, three hundred eighty-seven billion, seven hundred sixty-four million, twenty-seven thousand, seven hundred sixty-five".