1061565165 has 24 divisors (see below), whose sum is σ = 1845532728. Its totient is φ = 564480000.

The previous prime is 1061565157. The next prime is 1061565179. The reversal of 1061565165 is 5615651601.

It can be written as a sum of positive squares in 4 ways, for example, as 167495364 + 894069801 = 12942^2 + 29901^2 .

It is not a de Polignac number, because 1061565165 - 2³ = 1061565157 is a prime.

It is a super-2 number, since 2×1061565165² = 2253841199082954450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19836 + ... + 50165.

It is an arithmetic number, because the mean of its divisors is an integer number (76897197).

Almost surely, 2^1061565165 is an apocalyptic number.

1061565165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1061565165 is a deficient number, since it is larger than the sum of its proper divisors (783967563).

1061565165 is a wasteful number, since it uses less digits than its factorization.

1061565165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70349 (or 70346 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 1061565165 is about 32581.6691561375. The cubic root of 1061565165 is about 1020.1144191137.

The spelling of 1061565165 in words is "one billion, sixty-one million, five hundred sixty-five thousand, one hundred sixty-five".