23405251566215 has 16 divisors (see below), whose sum is σ = 30001609307808. Its totient is φ = 17466823858176.

The previous prime is 23405251566211. The next prime is 23405251566233. The reversal of 23405251566215 is 51266515250432.

It is a cyclic number.

It is not a de Polignac number, because 23405251566215 - 2² = 23405251566211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23405251566215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23405251566211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1218379337 + ... + 1218398546.

It is an arithmetic number, because the mean of its divisors is an integer number (1875100581738).

Almost surely, 2^{23405251566215} is an apocalyptic number.

23405251566215 is a deficient number, since it is larger than the sum of its proper divisors (6596357741593).

23405251566215 is a wasteful number, since it uses less digits than its factorization.

23405251566215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2436778018.

The product of its (nonzero) digits is 2160000, while the sum is 47.

The spelling of 23405251566215 in words is "twenty-three trillion, four hundred five billion, two hundred fifty-one million, five hundred sixty-six thousand, two hundred fifteen".