15432256823 has 4 divisors (see below), whose sum is σ = 15964403640. Its totient is φ = 14900110008.

The previous prime is 15432256789. The next prime is 15432256859. The reversal of 15432256823 is 32865223451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32865223451 = 3019 ⋅10886129.

It is a cyclic number.

It is not a de Polignac number, because 15432256823 - 2²² = 15428062519 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 (15432256883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266073365 + ... + 266073422.

It is an arithmetic number, because the mean of its divisors is an integer number (3991100910).

Almost surely, 2^15432256823 is an apocalyptic number.

15432256823 is a deficient number, since it is larger than the sum of its proper divisors (532146817).

15432256823 is an equidigital number, since it uses as much as digits as its factorization.

15432256823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532146816.

The product of its digits is 345600, while the sum is 41.

The spelling of 15432256823 in words is "fifteen billion, four hundred thirty-two million, two hundred fifty-six thousand, eight hundred twenty-three".