1321539090880 has 56 divisors (see below), whose sum is σ = 3148003435248. Its totient is φ = 528432795648.

The previous prime is 1321539090811. The next prime is 1321539090913. The reversal of 1321539090880 is 880909351231.

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, 214267 + ... + 1639813.

It is an arithmetic number, because the mean of its divisors is an integer number (56214347058).

Almost surely, 2^{1321539090880} is an apocalyptic number.

1321539090880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321539090880 is an abundant number, since it is smaller than the sum of its proper divisors (1826464344368).

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

1321539090880 is a wasteful number, since it uses less digits than its factorization.

1321539090880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428461 (or 1428451 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 49.

The spelling of 1321539090880 in words is "one trillion, three hundred twenty-one billion, five hundred thirty-nine million, ninety thousand, eight hundred eighty".