111644554561320 has 128 divisors (see below), whose sum is σ = 368999824337280. Its totient is φ = 26797372800000.

The previous prime is 111644554561307. The next prime is 111644554561333. The reversal of 111644554561320 is 23165455446111.

111644554561320 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (111644554561307) and next prime (111644554561333).

It is a self number, because there is not a number n which added to its sum of digits gives 111644554561320.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 418575631 + ... + 418842270.

It is an arithmetic number, because the mean of its divisors is an integer number (2882811127635).

Almost surely, 2^{111644554561320} is an apocalyptic number.

111644554561320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111644554561320 is an abundant number, since it is smaller than the sum of its proper divisors (257355269775960).

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

111644554561320 is a wasteful number, since it uses less digits than its factorization.

111644554561320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837418027 (or 837418023 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 48.

The spelling of 111644554561320 in words is "one hundred eleven trillion, six hundred forty-four billion, five hundred fifty-four million, five hundred sixty-one thousand, three hundred twenty".