28164897553 has 16 divisors (see below), whose sum is σ = 30625446096. Its totient is φ = 25746739200.

The previous prime is 28164897517. The next prime is 28164897557. The reversal of 28164897553 is 35579846182.

It can be written as a sum of positive squares in 8 ways, for example, as 11712217729 + 16452679824 = 108223^2 + 128268^2 .

It is not a de Polignac number, because 28164897553 - 2⁹ = 28164897041 is a prime.

It is a super-2 number, since 2×28164897553² (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 (28164897557) 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, 1903801 + ... + 1918537.

It is an arithmetic number, because the mean of its divisors is an integer number (1914090381).

Almost surely, 2^28164897553 is an apocalyptic number.

It is an amenable number.

28164897553 is a deficient number, since it is larger than the sum of its proper divisors (2460548543).

28164897553 is a wasteful number, since it uses less digits than its factorization.

28164897553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16164.

The product of its digits is 14515200, while the sum is 58.

The spelling of 28164897553 in words is "twenty-eight billion, one hundred sixty-four million, eight hundred ninety-seven thousand, five hundred fifty-three".