1065615590 has 32 divisors (see below), whose sum is σ = 2187168480. Its totient is φ = 370312704.

The previous prime is 1065615587. The next prime is 1065615613. The reversal of 1065615590 is 955165601.

It is a happy number.

It is a super-2 number, since 2×1065615590² = 2271073171302096200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238880 + ... + 243299.

It is an arithmetic number, because the mean of its divisors is an integer number (68349015).

Almost surely, 2^1065615590 is an apocalyptic number.

1065615590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1065615590 is an abundant number, since it is smaller than the sum of its proper divisors (1121552890).

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

1065615590 is a wasteful number, since it uses less digits than its factorization.

1065615590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482216.

The product of its (nonzero) digits is 40500, while the sum is 38.

The square root of 1065615590 is about 32643.7680116741. The cubic root of 1065615590 is about 1021.4101954131.

The spelling of 1065615590 in words is "one billion, sixty-five million, six hundred fifteen thousand, five hundred ninety".