28337132165 has 32 divisors (see below), whose sum is σ = 35276889312. Its totient is φ = 21836800000.

The previous prime is 28337132149. The next prime is 28337132183. The reversal of 28337132165 is 56123173382.

It can be written as a sum of positive squares in 16 ways, for example, as 743271169 + 27593860996 = 27263^2 + 166114^2 .

It is not a de Polignac number, because 28337132165 - 2⁴ = 28337132149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8300999 + ... + 8304411.

It is an arithmetic number, because the mean of its divisors is an integer number (1102402791).

Almost surely, 2^28337132165 is an apocalyptic number.

It is an amenable number.

28337132165 is a deficient number, since it is larger than the sum of its proper divisors (6939757147).

28337132165 is a wasteful number, since it uses less digits than its factorization.

28337132165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3961.

The product of its digits is 181440, while the sum is 41.

The spelling of 28337132165 in words is "twenty-eight billion, three hundred thirty-seven million, one hundred thirty-two thousand, one hundred sixty-five".