1377640277765 has 8 divisors (see below), whose sum is σ = 1665061631520. Its totient is φ = 1094183356752.

The previous prime is 1377640277759. The next prime is 1377640277813. The reversal of 1377640277765 is 5677720467731.

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

It is a cyclic number.

It is not a de Polignac number, because 1377640277765 - 2¹⁸ = 1377640015621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1377640277698 and 1377640277707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 991107419 + ... + 991108808.

It is an arithmetic number, because the mean of its divisors is an integer number (208132703940).

Almost surely, 2^{1377640277765} is an apocalyptic number.

It is an amenable number.

1377640277765 is a deficient number, since it is larger than the sum of its proper divisors (287421353755).

1377640277765 is a wasteful number, since it uses less digits than its factorization.

1377640277765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982216371.

The product of its (nonzero) digits is 72606240, while the sum is 62.

The spelling of 1377640277765 in words is "one trillion, three hundred seventy-seven billion, six hundred forty million, two hundred seventy-seven thousand, seven hundred sixty-five".