1331655009520 has 160 divisors (see below), whose sum is σ = 3414538955520. Its totient is φ = 478943109120.

The previous prime is 1331655009473. The next prime is 1331655009551. The reversal of 1331655009520 is 259005561331.

It is a super-2 number, since 2×1331655009520² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168923499 + ... + 168931381.

It is an arithmetic number, because the mean of its divisors is an integer number (21340868472).

Almost surely, 2^{1331655009520} is an apocalyptic number.

1331655009520 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 1331655009520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1707269477760).

1331655009520 is an abundant number, since it is smaller than the sum of its proper divisors (2082883946000).

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

1331655009520 is a wasteful number, since it uses less digits than its factorization.

1331655009520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9983 (or 9977 counting only the distinct ones).

The product of its (nonzero) digits is 121500, while the sum is 40.

The spelling of 1331655009520 in words is "one trillion, three hundred thirty-one billion, six hundred fifty-five million, nine thousand, five hundred twenty".