1009181916 has 36 divisors (see below), whose sum is σ = 2645471192. Its totient is φ = 336393648.

The previous prime is 1009181911. The next prime is 1009181959. The reversal of 1009181916 is 6191819001.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1009181911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 518155 + ... + 520098.

Almost surely, 2^1009181916 is an apocalyptic number.

It is an amenable number.

1009181916 is an abundant number, since it is smaller than the sum of its proper divisors (1636289276).

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

1009181916 is a wasteful number, since it uses less digits than its factorization.

1009181916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038272 (or 1038258 counting only the distinct ones).

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

The square root of 1009181916 is about 31767.6237071645. The cubic root of 1009181916 is about 1003.0513186513.

The spelling of 1009181916 in words is "one billion, nine million, one hundred eighty-one thousand, nine hundred sixteen".