23391891828865 has 16 divisors (see below), whose sum is σ = 32080408322688. Its totient is φ = 16040104632576.

The previous prime is 23391891828787. The next prime is 23391891828871. The reversal of 23391891828865 is 56882819819332.

It is a cyclic number.

It is not a de Polignac number, because 23391891828865 - 2⁷ = 23391891828737 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13133529 + ... + 14807881.

It is an arithmetic number, because the mean of its divisors is an integer number (2005025520168).

Almost surely, 2^{23391891828865} is an apocalyptic number.

It is an amenable number.

23391891828865 is a deficient number, since it is larger than the sum of its proper divisors (8688516493823).

23391891828865 is a wasteful number, since it uses less digits than its factorization.

23391891828865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2073528.

The product of its digits is 358318080, while the sum is 73.

The spelling of 23391891828865 in words is "twenty-three trillion, three hundred ninety-one billion, eight hundred ninety-one million, eight hundred twenty-eight thousand, eight hundred sixty-five".