23555590357 has 4 divisors (see below), whose sum is σ = 25367558860. Its totient is φ = 21743621856.

The previous prime is 23555590339. The next prime is 23555590379. The reversal of 23555590357 is 75309555532.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1225070001 + 22330520356 = 35001^2 + 149434^2 .

It is a cyclic number.

It is not a de Polignac number, because 23555590357 - 2⁷ = 23555590229 is a prime.

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 23555590357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23555590307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 905984232 + ... + 905984257.

It is an arithmetic number, because the mean of its divisors is an integer number (6341889715).

Almost surely, 2^23555590357 is an apocalyptic number.

It is an amenable number.

23555590357 is a deficient number, since it is larger than the sum of its proper divisors (1811968503).

23555590357 is a wasteful number, since it uses less digits than its factorization.

23555590357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811968502.

The product of its (nonzero) digits is 3543750, while the sum is 49.

The spelling of 23555590357 in words is "twenty-three billion, five hundred fifty-five million, five hundred ninety thousand, three hundred fifty-seven".