28431514563 has 16 divisors (see below), whose sum is σ = 38797194240. Its totient is φ = 18513297504.

The previous prime is 28431514549. The next prime is 28431514577. The reversal of 28431514563 is 36541513482.

It is an interprime number because it is at equal distance from previous prime (28431514549) and next prime (28431514577).

It is not a de Polignac number, because 28431514563 - 2²⁴ = 28414737347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28431514763) 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, 365473 + ... + 436386.

It is an arithmetic number, because the mean of its divisors is an integer number (2424824640).

Almost surely, 2^28431514563 is an apocalyptic number.

28431514563 is a deficient number, since it is larger than the sum of its proper divisors (10365679677).

28431514563 is a wasteful number, since it uses less digits than its factorization.

28431514563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802138.

The product of its digits is 345600, while the sum is 42.

The spelling of 28431514563 in words is "twenty-eight billion, four hundred thirty-one million, five hundred fourteen thousand, five hundred sixty-three".