1381999952016 has 80 divisors (see below), whose sum is σ = 4021192240320. Its totient is φ = 454356138240.

The previous prime is 1381999951993. The next prime is 1381999952027. The reversal of 1381999952016 is 6102599991831.

1381999952016 is a `hidden beast` number, since 1 + 3 + 8 + 1 + 9 + 9 + 99 + 520 + 16 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21879930 + ... + 21943001.

It is an arithmetic number, because the mean of its divisors is an integer number (50264903004).

Almost surely, 2^{1381999952016} is an apocalyptic number.

1381999952016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1381999952016 is an abundant number, since it is smaller than the sum of its proper divisors (2639192288304).

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

1381999952016 is a wasteful number, since it uses less digits than its factorization.

1381999952016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43823021 (or 43823009 counting only the distinct ones).

The product of its (nonzero) digits is 9447840, while the sum is 63.

The spelling of 1381999952016 in words is "one trillion, three hundred eighty-one billion, nine hundred ninety-nine million, nine hundred fifty-two thousand, sixteen".