23198651565 has 32 divisors (see below), whose sum is σ = 37313101056. Its totient is φ = 12307645440.

The previous prime is 23198651549. The next prime is 23198651573. The reversal of 23198651565 is 56515689132.

It is not a de Polignac number, because 23198651565 - 2⁴ = 23198651549 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3839727 + ... + 3845763.

It is an arithmetic number, because the mean of its divisors is an integer number (1166034408).

Almost surely, 2^23198651565 is an apocalyptic number.

It is an amenable number.

23198651565 is a deficient number, since it is larger than the sum of its proper divisors (14114449491).

23198651565 is a wasteful number, since it uses less digits than its factorization.

23198651565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7349.

The product of its digits is 1944000, while the sum is 51.

The spelling of 23198651565 in words is "twenty-three billion, one hundred ninety-eight million, six hundred fifty-one thousand, five hundred sixty-five".