9897855522 has 64 divisors (see below), whose sum is σ = 20599308288. Its totient is φ = 3167208000.

The previous prime is 9897855479. The next prime is 9897855557. The reversal of 9897855522 is 2255587989.

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, 22964647 + ... + 22965077.

It is an arithmetic number, because the mean of its divisors is an integer number (321864192).

Almost surely, 2^9897855522 is an apocalyptic number.

9897855522 is an abundant number, since it is smaller than the sum of its proper divisors (10701452766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9897855522 is a wasteful number, since it uses less digits than its factorization.

9897855522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175.

The product of its digits is 18144000, while the sum is 60.

The square root of 9897855522 is about 99487.9667195988. The cubic root of 9897855522 is about 2147.0741179000.

The spelling of 9897855522 in words is "nine billion, eight hundred ninety-seven million, eight hundred fifty-five thousand, five hundred twenty-two".