23591378890 has 16 divisors (see below), whose sum is σ = 44962393032. Its totient is φ = 8881460224.

The previous prime is 23591378879. The next prime is 23591378891. The reversal of 23591378890 is 9887319532.

It can be written as a sum of positive squares in 4 ways, for example, as 23025938049 + 565440841 = 151743^2 + 23779^2 .

It is not an unprimeable number, because it can be changed into a prime (23591378891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69386239 + ... + 69386578.

Almost surely, 2^23591378890 is an apocalyptic number.

23591378890 is a deficient number, since it is larger than the sum of its proper divisors (21371014142).

23591378890 is a wasteful number, since it uses less digits than its factorization.

23591378890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138772841.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 23591378890 in words is "twenty-three billion, five hundred ninety-one million, three hundred seventy-eight thousand, eight hundred ninety".