1377512638865 has 8 divisors (see below), whose sum is σ = 1803289272768. Its totient is φ = 1001827373680.

The previous prime is 1377512638847. The next prime is 1377512638939. The reversal of 1377512638865 is 5688362157731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1377512638865 - 2³⁸ = 1102634731921 is a prime.

It is a super-3 number, since 3×1377512638865³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1377512638798 and 1377512638807.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12522842117 + ... + 12522842226.

It is an arithmetic number, because the mean of its divisors is an integer number (225411159096).

Almost surely, 2^{1377512638865} is an apocalyptic number.

It is an amenable number.

1377512638865 is a deficient number, since it is larger than the sum of its proper divisors (425776633903).

1377512638865 is a wasteful number, since it uses less digits than its factorization.

1377512638865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25045684359.

The product of its digits is 50803200, while the sum is 62.

The spelling of 1377512638865 in words is "one trillion, three hundred seventy-seven billion, five hundred twelve million, six hundred thirty-eight thousand, eight hundred sixty-five".