28315162969 has 4 divisors (see below), whose sum is σ = 28400707600. Its totient is φ = 28229618340.

The previous prime is 28315162963. The next prime is 28315162973. The reversal of 28315162969 is 96926151382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96926151382 = 2 ⋅48463075691.

It is a cyclic number.

It is not a de Polignac number, because 28315162969 - 2¹⁷ = 28315031897 is a prime.

It is a super-2 number, since 2×28315162969² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28315162963) 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, 42771819 + ... + 42772480.

It is an arithmetic number, because the mean of its divisors is an integer number (7100176900).

Almost surely, 2^28315162969 is an apocalyptic number.

It is an amenable number.

28315162969 is a deficient number, since it is larger than the sum of its proper divisors (85544631).

28315162969 is an equidigital number, since it uses as much as digits as its factorization.

28315162969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85544630.

The product of its digits is 1399680, while the sum is 52.

The spelling of 28315162969 in words is "twenty-eight billion, three hundred fifteen million, one hundred sixty-two thousand, nine hundred sixty-nine".