1009819161 has 48 divisors (see below), whose sum is σ = 1606725120. Its totient is φ = 607357440.

The previous prime is 1009819157. The next prime is 1009819169. The reversal of 1009819161 is 1619189001.

It is not a de Polignac number, because 1009819161 - 2² = 1009819157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1009819169) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1663320 + ... + 1663926.

It is an arithmetic number, because the mean of its divisors is an integer number (33473440).

Almost surely, 2^1009819161 is an apocalyptic number.

It is an amenable number.

1009819161 is a deficient number, since it is larger than the sum of its proper divisors (596905959).

1009819161 is a wasteful number, since it uses less digits than its factorization.

1009819161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926 (or 923 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 36.

The square root of 1009819161 is about 31777.6519113669. The cubic root of 1009819161 is about 1003.2623988463.

The spelling of 1009819161 in words is "one billion, nine million, eight hundred nineteen thousand, one hundred sixty-one".