23215781760 has 128 divisors (see below), whose sum is σ = 74074815360. Its totient is φ = 6184642560.

The previous prime is 23215781671. The next prime is 23215781777. The reversal of 23215781760 is 6718751232.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2089179 + ... + 2100261.

It is an arithmetic number, because the mean of its divisors is an integer number (578709495).

Almost surely, 2^23215781760 is an apocalyptic number.

23215781760 is a gapful number since it is divisible by the number (20) 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 23215781760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37037407680).

23215781760 is an abundant number, since it is smaller than the sum of its proper divisors (50859033600).

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

23215781760 is a wasteful number, since it uses less digits than its factorization.

23215781760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12196 (or 12184 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The spelling of 23215781760 in words is "twenty-three billion, two hundred fifteen million, seven hundred eighty-one thousand, seven hundred sixty".