1377370661655 has 16 divisors (see below), whose sum is σ = 2203824115584. Its totient is φ = 734587333920.

The previous prime is 1377370661617. The next prime is 1377370661731. The reversal of 1377370661655 is 5561660737731.

It is not a de Polignac number, because 1377370661655 - 2⁹ = 1377370661143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1377370661595 and 1377370661604.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 520860 + ... + 1739550.

It is an arithmetic number, because the mean of its divisors is an integer number (137739007224).

Almost surely, 2^{1377370661655} is an apocalyptic number.

1377370661655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1377370661655 is a deficient number, since it is larger than the sum of its proper divisors (826453453929).

1377370661655 is a wasteful number, since it uses less digits than its factorization.

1377370661655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294046.

The product of its (nonzero) digits is 16669800, while the sum is 57.

The spelling of 1377370661655 in words is "one trillion, three hundred seventy-seven billion, three hundred seventy million, six hundred sixty-one thousand, six hundred fifty-five".