1617161091 has 32 divisors (see below), whose sum is σ = 2809916928. Its totient is φ = 802828800.

The previous prime is 1617161059. The next prime is 1617161113. The reversal of 1617161091 is 1901617161.

It is not a de Polignac number, because 1617161091 - 2⁵ = 1617161059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1617161291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169585 + ... + 178866.

It is an arithmetic number, because the mean of its divisors is an integer number (87809904).

Almost surely, 2^1617161091 is an apocalyptic number.

1617161091 is a deficient number, since it is larger than the sum of its proper divisors (1192755837).

1617161091 is a wasteful number, since it uses less digits than its factorization.

1617161091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348491.

The product of its (nonzero) digits is 2268, while the sum is 33.

The square root of 1617161091 is about 40213.9415004299. The cubic root of 1617161091 is about 1173.7738447342.

The spelling of 1617161091 in words is "one billion, six hundred seventeen million, one hundred sixty-one thousand, ninety-one".