8509857902 has 32 divisors (see below), whose sum is σ = 16537382400. Its totient is φ = 3189349728.

The previous prime is 8509857893. The next prime is 8509857907. The reversal of 8509857902 is 2097589058.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8509857907) 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, 1227002 + ... + 1233917.

It is an arithmetic number, because the mean of its divisors is an integer number (516793200).

Almost surely, 2^8509857902 is an apocalyptic number.

8509857902 is a deficient number, since it is larger than the sum of its proper divisors (8027524498).

8509857902 is a wasteful number, since it uses less digits than its factorization.

8509857902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2460960.

The product of its (nonzero) digits is 1814400, while the sum is 53.

The square root of 8509857902 is about 92248.8910610854. The cubic root of 8509857902 is about 2041.6161982368.

The spelling of 8509857902 in words is "eight billion, five hundred nine million, eight hundred fifty-seven thousand, nine hundred two".