9857506623 has 16 divisors (see below), whose sum is σ = 13421928960. Its totient is φ = 6432944544.

The previous prime is 9857506579. The next prime is 9857506639. The reversal of 9857506623 is 3266057589.

It is a happy number.

It is not a de Polignac number, because 9857506623 - 2⁹ = 9857506111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9857506123) 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, 811 + ... + 140412.

It is an arithmetic number, because the mean of its divisors is an integer number (838870560).

Almost surely, 2^9857506623 is an apocalyptic number.

9857506623 is a deficient number, since it is larger than the sum of its proper divisors (3564422337).

9857506623 is a wasteful number, since it uses less digits than its factorization.

9857506623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141718.

The product of its (nonzero) digits is 2721600, while the sum is 51.

The square root of 9857506623 is about 99284.9768242910. The cubic root of 9857506623 is about 2144.1526075025.

The spelling of 9857506623 in words is "nine billion, eight hundred fifty-seven million, five hundred six thousand, six hundred twenty-three".