23421571665 has 16 divisors (see below), whose sum is σ = 37481600448. Its totient is φ = 12489142976.

The previous prime is 23421571637. The next prime is 23421571717. The reversal of 23421571665 is 56617512432.

It is a cyclic number.

It is not a de Polignac number, because 23421571665 - 2⁵ = 23421571633 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64122 + ... + 225731.

It is an arithmetic number, because the mean of its divisors is an integer number (2342600028).

Almost surely, 2^23421571665 is an apocalyptic number.

It is an amenable number.

23421571665 is a deficient number, since it is larger than the sum of its proper divisors (14060028783).

23421571665 is a wasteful number, since it uses less digits than its factorization.

23421571665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295248.

The product of its digits is 302400, while the sum is 42.

The spelling of 23421571665 in words is "twenty-three billion, four hundred twenty-one million, five hundred seventy-one thousand, six hundred sixty-five".