28525170419 has 4 divisors (see below), whose sum is σ = 28546130760. Its totient is φ = 28504210080.

The previous prime is 28525170403. The next prime is 28525170431. The reversal of 28525170419 is 91407152582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91407152582 = 2 ⋅45703576291.

It is a cyclic number.

It is not a de Polignac number, because 28525170419 - 2⁴ = 28525170403 is a prime.

It is a super-2 number, since 2×28525170419² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28525170419.

It is not an unprimeable number, because it can be changed into a prime (28525170119) 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, 10478129 + ... + 10480850.

It is an arithmetic number, because the mean of its divisors is an integer number (7136532690).

Almost surely, 2^28525170419 is an apocalyptic number.

28525170419 is a deficient number, since it is larger than the sum of its proper divisors (20960341).

28525170419 is a wasteful number, since it uses less digits than its factorization.

28525170419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20960340.

The product of its (nonzero) digits is 201600, while the sum is 44.

The spelling of 28525170419 in words is "twenty-eight billion, five hundred twenty-five million, one hundred seventy thousand, four hundred nineteen".