28157917543 has 16 divisors (see below), whose sum is σ = 32509633536. Its totient is φ = 23889075840.

The previous prime is 28157917519. The next prime is 28157917549. The reversal of 28157917543 is 34571975182.

It is not a de Polignac number, because 28157917543 - 2⁵ = 28157917511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28157917549) 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, 563758 + ... + 611668.

It is an arithmetic number, because the mean of its divisors is an integer number (2031852096).

Almost surely, 2^28157917543 is an apocalyptic number.

28157917543 is a deficient number, since it is larger than the sum of its proper divisors (4351715993).

28157917543 is a wasteful number, since it uses less digits than its factorization.

28157917543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48774.

The product of its digits is 2116800, while the sum is 52.

The spelling of 28157917543 in words is "twenty-eight billion, one hundred fifty-seven million, nine hundred seventeen thousand, five hundred forty-three".