1164565621560 has 256 divisors, whose sum is σ = 3867370997760. Its totient is φ = 278173716480.

The previous prime is 1164565621559. The next prime is 1164565621577. The reversal of 1164565621560 is 651265654611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 106279602 + ... + 106290558.

It is an arithmetic number, because the mean of its divisors is an integer number (15106917960).

Almost surely, 2^{1164565621560} is an apocalyptic number.

1164565621560 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 1164565621560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1933685498880).

1164565621560 is an abundant number, since it is smaller than the sum of its proper divisors (2702805376200).

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

1164565621560 is a wasteful number, since it uses less digits than its factorization.

1164565621560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12158 (or 12154 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 48.

The spelling of 1164565621560 in words is "one trillion, one hundred sixty-four billion, five hundred sixty-five million, six hundred twenty-one thousand, five hundred sixty".