1083865815520 has 48 divisors (see below), whose sum is σ = 2560695348960. Its totient is φ = 433535768064.

The previous prime is 1083865815491. The next prime is 1083865815523. The reversal of 1083865815520 is 255185683801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1083865815523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12280669 + ... + 12368611.

It is an arithmetic number, because the mean of its divisors is an integer number (53347819770).

Almost surely, 2^{1083865815520} is an apocalyptic number.

1083865815520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1083865815520 is an abundant number, since it is smaller than the sum of its proper divisors (1476829533440).

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

1083865815520 is an equidigital number, since it uses as much as digits as its factorization.

1083865815520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164987 (or 164979 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 52.

The spelling of 1083865815520 in words is "one trillion, eighty-three billion, eight hundred sixty-five million, eight hundred fifteen thousand, five hundred twenty".