23155521074400 has 864 divisors, whose sum is σ = 89225729687808. Its totient is φ = 5170529894400.

The previous prime is 23155521074383. The next prime is 23155521074401. The reversal of 23155521074400 is 447012555132.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23155521074401) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2172793872 + ... + 2172804528.

It is an arithmetic number, because the mean of its divisors is an integer number (103270520472).

Almost surely, 2^{23155521074400} is an apocalyptic number.

23155521074400 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 23155521074400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44612864843904).

23155521074400 is an abundant number, since it is smaller than the sum of its proper divisors (66070208613408).

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

23155521074400 is a wasteful number, since it uses less digits than its factorization.

23155521074400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11204 (or 11178 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 39.

The spelling of 23155521074400 in words is "twenty-three trillion, one hundred fifty-five billion, five hundred twenty-one million, seventy-four thousand, four hundred".