15525643023 has 48 divisors (see below), whose sum is σ = 26133303456. Its totient is φ = 8777502720.

The previous prime is 15525643019. The next prime is 15525643039. The reversal of 15525643023 is 32034652551.

15525643023 is a `hidden beast` number, since 1 + 5 + 5 + 2 + 5 + 643 + 0 + 2 + 3 = 666.

It is not a de Polignac number, because 15525643023 - 2² = 15525643019 is a prime.

It is a super-3 number, since 3×15525643023³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15525643073) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 149361 + ... + 230997.

It is an arithmetic number, because the mean of its divisors is an integer number (544443822).

Almost surely, 2^15525643023 is an apocalyptic number.

15525643023 is a deficient number, since it is larger than the sum of its proper divisors (10607660433).

15525643023 is a wasteful number, since it uses less digits than its factorization.

15525643023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81784 (or 81781 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The spelling of 15525643023 in words is "fifteen billion, five hundred twenty-five million, six hundred forty-three thousand, twenty-three".