1085155565 has 8 divisors (see below), whose sum is σ = 1402354968. Its totient is φ = 801345600.

The previous prime is 1085155541. The next prime is 1085155597. The reversal of 1085155565 is 5655515801.

It can be written as a sum of positive squares in 4 ways, for example, as 74615044 + 1010540521 = 8638^2 + 31789^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1085155565 - 2⁶ = 1085155501 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 8347286 + ... + 8347415.

It is an arithmetic number, because the mean of its divisors is an integer number (175294371).

Almost surely, 2^1085155565 is an apocalyptic number.

It is an amenable number.

1085155565 is a deficient number, since it is larger than the sum of its proper divisors (317199403).

1085155565 is a wasteful number, since it uses less digits than its factorization.

1085155565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16694719.

The product of its (nonzero) digits is 150000, while the sum is 41.

The square root of 1085155565 is about 32941.6994856064. The cubic root of 1085155565 is about 1027.6155497041.

The spelling of 1085155565 in words is "one billion, eighty-five million, one hundred fifty-five thousand, five hundred sixty-five".