1377988907856 has 160 divisors (see below), whose sum is σ = 3983984580096. Its totient is φ = 406887360000.

The previous prime is 1377988907849. The next prime is 1377988907879. The reversal of 1377988907856 is 6587098897731.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3246331 + ... + 3646181.

Almost surely, 2^{1377988907856} is an apocalyptic number.

1377988907856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1377988907856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1991992290048).

1377988907856 is an abundant number, since it is smaller than the sum of its proper divisors (2605995672240).

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

1377988907856 is a wasteful number, since it uses less digits than its factorization.

1377988907856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400041 (or 400035 counting only the distinct ones).

The product of its (nonzero) digits is 1280240640, while the sum is 78.

The spelling of 1377988907856 in words is "one trillion, three hundred seventy-seven billion, nine hundred eighty-eight million, nine hundred seven thousand, eight hundred fifty-six".