23855454981 has 6 divisors (see below), whose sum is σ = 34457879430. Its totient is φ = 15903636648.

The previous prime is 23855454913. The next prime is 23855455007. The reversal of 23855454981 is 18945455832.

23855454981 is a `hidden beast` number, since 2 + 3 + 8 + 5 + 545 + 4 + 98 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19318220100 + 4537234881 = 138990^2 + 67359^2 .

It is not a de Polignac number, because 23855454981 - 2¹⁷ = 23855323909 is a prime.

It is a super-2 number, since 2×23855454981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23855454881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1325303046 + ... + 1325303063.

It is an arithmetic number, because the mean of its divisors is an integer number (5742979905).

Almost surely, 2^23855454981 is an apocalyptic number.

It is an amenable number.

23855454981 is a deficient number, since it is larger than the sum of its proper divisors (10602424449).

23855454981 is a wasteful number, since it uses less digits than its factorization.

23855454981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2650606115 (or 2650606112 counting only the distinct ones).

The product of its digits is 6912000, while the sum is 54.

The spelling of 23855454981 in words is "twenty-three billion, eight hundred fifty-five million, four hundred fifty-four thousand, nine hundred eighty-one".