23853778816 has 128 divisors (see below), whose sum is σ = 56191979520. Its totient is φ = 9870336000.

The previous prime is 23853778811. The next prime is 23853778831. The reversal of 23853778816 is 61887735832.

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

It is a super-3 number, since 3×23853778816³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23853778811) by changing a digit.

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, 17525976 + ... + 17527336.

It is an arithmetic number, because the mean of its divisors is an integer number (438999840).

Almost surely, 2^23853778816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23853778816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28095989760).

23853778816 is an abundant number, since it is smaller than the sum of its proper divisors (32338200704).

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

23853778816 is a wasteful number, since it uses less digits than its factorization.

23853778816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2044 (or 2032 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 58.

The spelling of 23853778816 in words is "twenty-three billion, eight hundred fifty-three million, seven hundred seventy-eight thousand, eight hundred sixteen".