1320887563998 has 32 divisors (see below), whose sum is σ = 2730082348032. Its totient is φ = 425610158400.

The previous prime is 1320887563991. The next prime is 1320887564011. The reversal of 1320887563998 is 8993657880231.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320887563991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3857023 + ... + 4185498.

It is an arithmetic number, because the mean of its divisors is an integer number (85315073376).

Almost surely, 2^{1320887563998} is an apocalyptic number.

1320887563998 is an abundant number, since it is smaller than the sum of its proper divisors (1409194784034).

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

1320887563998 is a wasteful number, since it uses less digits than its factorization.

1320887563998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8043440.

The product of its (nonzero) digits is 156764160, while the sum is 69.

The spelling of 1320887563998 in words is "one trillion, three hundred twenty billion, eight hundred eighty-seven million, five hundred sixty-three thousand, nine hundred ninety-eight".