1387876378765 has 16 divisors (see below), whose sum is σ = 1704314481408. Its totient is φ = 1084396533696.

The previous prime is 1387876378723. The next prime is 1387876378769. The reversal of 1387876378765 is 5678736787831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1387876378765 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1387876378691 and 1387876378700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387876378769) 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, 2623119 + ... + 3107491.

It is an arithmetic number, because the mean of its divisors is an integer number (106519655088).

Almost surely, 2^{1387876378765} is an apocalyptic number.

It is an amenable number.

1387876378765 is a deficient number, since it is larger than the sum of its proper divisors (316438102643).

1387876378765 is a wasteful number, since it uses less digits than its factorization.

1387876378765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497748.

The product of its digits is 1991485440, while the sum is 76.

The spelling of 1387876378765 in words is "one trillion, three hundred eighty-seven billion, eight hundred seventy-six million, three hundred seventy-eight thousand, seven hundred sixty-five".