1380587120640 has 2592 divisors, whose sum is σ = 6343681911840. Its totient is φ = 286941118464.

The previous prime is 1380587120639. The next prime is 1380587120669. The reversal of 1380587120640 is 460217850831.

1380587120640 is a `hidden beast` number, since 1 + 3 + 8 + 0 + 587 + 1 + 2 + 0 + 64 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (2592).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 20605777887 + ... + 20605777953.

It is an arithmetic number, because the mean of its divisors is an integer number (2447408145).

Almost surely, 2^{1380587120640} is an apocalyptic number.

1380587120640 is a gapful number since it is divisible by the number (10) 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 1380587120640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3171840955920).

1380587120640 is an abundant number, since it is smaller than the sum of its proper divisors (4963094791200).

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

1380587120640 is an equidigital number, since it uses as much as digits as its factorization.

1380587120640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 1380587120640 in words is "one trillion, three hundred eighty billion, five hundred eighty-seven million, one hundred twenty thousand, six hundred forty".