1377335606656 has 64 divisors (see below), whose sum is σ = 3005500788000. Its totient is φ = 625807630336.

The previous prime is 1377335606651. The next prime is 1377335606659. The reversal of 1377335606656 is 6566065337731.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a self number, because there is not a number n which added to its sum of digits gives 1377335606656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377335606651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10850116 + ... + 10976323.

Almost surely, 2^{1377335606656} is an apocalyptic number.

1377335606656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1377335606656 is an abundant number, since it is smaller than the sum of its proper divisors (1628165181344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1377335606656 is a wasteful number, since it uses less digits than its factorization.

1377335606656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21826499 (or 21826487 counting only the distinct ones).

The product of its (nonzero) digits is 42865200, while the sum is 58.

The spelling of 1377335606656 in words is "one trillion, three hundred seventy-seven billion, three hundred thirty-five million, six hundred six thousand, six hundred fifty-six".