23645816487 has 16 divisors (see below), whose sum is σ = 35845511680. Its totient is φ = 15397275096.

The previous prime is 23645816431. The next prime is 23645816489. The reversal of 23645816487 is 78461854632.

It is a happy number.

23645816487 is a `hidden beast` number, since 23 + 6 + 458 + 164 + 8 + 7 = 666.

It is not a de Polignac number, because 23645816487 - 2¹⁸ = 23645554343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23645816489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10182223 + ... + 10184544.

It is an arithmetic number, because the mean of its divisors is an integer number (2240344480).

Almost surely, 2^23645816487 is an apocalyptic number.

23645816487 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

23645816487 is a deficient number, since it is larger than the sum of its proper divisors (12199695193).

23645816487 is a wasteful number, since it uses less digits than its factorization.

23645816487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20366819 (or 20366813 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 54.

The spelling of 23645816487 in words is "twenty-three billion, six hundred forty-five million, eight hundred sixteen thousand, four hundred eighty-seven".