23981455361 has 4 divisors (see below), whose sum is σ = 23983155924. Its totient is φ = 23979754800.

The previous prime is 23981455313. The next prime is 23981455387. The reversal of 23981455361 is 16355418932.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18304737025 + 5676718336 = 135295^2 + 75344^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23981455361 is a prime.

It is a super-2 number, since 2×23981455361² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23981455661) 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 3 ways as a sum of consecutive naturals, for example, 828950 + ... + 857391.

It is an arithmetic number, because the mean of its divisors is an integer number (5995788981).

Almost surely, 2^23981455361 is an apocalyptic number.

It is an amenable number.

23981455361 is a deficient number, since it is larger than the sum of its proper divisors (1700563).

23981455361 is a wasteful number, since it uses less digits than its factorization.

23981455361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700562.

The product of its digits is 777600, while the sum is 47.

The spelling of 23981455361 in words is "twenty-three billion, nine hundred eighty-one million, four hundred fifty-five thousand, three hundred sixty-one".