23772217505 has 16 divisors (see below), whose sum is σ = 29528371200. Its totient is φ = 18358062912.

The previous prime is 23772217493. The next prime is 23772217549. The reversal of 23772217505 is 50571227732.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 23772217505 - 2⁴ = 23772217489 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, 482405 + ... + 529394.

It is an arithmetic number, because the mean of its divisors is an integer number (1845523200).

Almost surely, 2^23772217505 is an apocalyptic number.

It is an amenable number.

23772217505 is a deficient number, since it is larger than the sum of its proper divisors (5756153695).

23772217505 is a wasteful number, since it uses less digits than its factorization.

23772217505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011968.

The product of its (nonzero) digits is 205800, while the sum is 41.

The spelling of 23772217505 in words is "twenty-three billion, seven hundred seventy-two million, two hundred seventeen thousand, five hundred five".