23865462891 has 8 divisors (see below), whose sum is σ = 35356241360. Its totient is φ = 15910308576.

The previous prime is 23865462853. The next prime is 23865462947. The reversal of 23865462891 is 19826456832.

23865462891 is a `hidden beast` number, since 2 + 3 + 8 + 6 + 5 + 4 + 628 + 9 + 1 = 666.

It is not a de Polignac number, because 23865462891 - 2²¹ = 23863365739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23865462191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441952990 + ... + 441953043.

It is an arithmetic number, because the mean of its divisors is an integer number (4419530170).

Almost surely, 2^23865462891 is an apocalyptic number.

23865462891 is a deficient number, since it is larger than the sum of its proper divisors (11490778469).

23865462891 is an equidigital number, since it uses as much as digits as its factorization.

23865462891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883906042 (or 883906036 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The spelling of 23865462891 in words is "twenty-three billion, eight hundred sixty-five million, four hundred sixty-two thousand, eight hundred ninety-one".