1617870085 has 16 divisors (see below), whose sum is σ = 2104116336. Its totient is φ = 1187117568.

The previous prime is 1617870077. The next prime is 1617870097. The reversal of 1617870085 is 5800787161.

It can be written as a sum of positive squares in 8 ways, for example, as 155725441 + 1462144644 = 12479^2 + 38238^2 .

It is not a de Polignac number, because 1617870085 - 2³ = 1617870077 is a prime.

It is a super-2 number, since 2×1617870085² = 5235007223875814450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69064 + ... + 89473.

It is an arithmetic number, because the mean of its divisors is an integer number (131507271).

Almost surely, 2^1617870085 is an apocalyptic number.

It is an amenable number.

1617870085 is a deficient number, since it is larger than the sum of its proper divisors (486246251).

1617870085 is a wasteful number, since it uses less digits than its factorization.

1617870085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158712.

The product of its (nonzero) digits is 94080, while the sum is 43.

The square root of 1617870085 is about 40222.7558106105. The cubic root of 1617870085 is about 1173.9453545548.

The spelling of 1617870085 in words is "one billion, six hundred seventeen million, eight hundred seventy thousand, eighty-five".