1381985312480 has 48 divisors (see below), whose sum is σ = 3265560540144. Its totient is φ = 552689111040.

The previous prime is 1381985312479. The next prime is 1381985312537. The reversal of 1381985312480 is 842135891831.

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, 27179 + ... + 1662741.

It is an arithmetic number, because the mean of its divisors is an integer number (68032511253).

Almost surely, 2^{1381985312480} is an apocalyptic number.

1381985312480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1381985312480 is an abundant number, since it is smaller than the sum of its proper divisors (1883575227664).

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

1381985312480 is a wasteful number, since it uses less digits than its factorization.

1381985312480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640859 (or 1640851 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 53.

The spelling of 1381985312480 in words is "one trillion, three hundred eighty-one billion, nine hundred eighty-five million, three hundred twelve thousand, four hundred eighty".