1065581646 has 16 divisors (see below), whose sum is σ = 2137104000. Its totient is φ = 354203768.

The previous prime is 1065581609. The next prime is 1065581653. The reversal of 1065581646 is 6461855601.

It is a super-2 number, since 2×1065581646² = 2270928488584138632, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1065581598 and 1065581607.

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, 245196 + ... + 249503.

It is an arithmetic number, because the mean of its divisors is an integer number (133569000).

Almost surely, 2^1065581646 is an apocalyptic number.

1065581646 is an abundant number, since it is smaller than the sum of its proper divisors (1071522354).

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

1065581646 is a wasteful number, since it uses less digits than its factorization.

1065581646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495063.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 1065581646 is about 32643.2480920634. The cubic root of 1065581646 is about 1021.3993500025.

The spelling of 1065581646 in words is "one billion, sixty-five million, five hundred eighty-one thousand, six hundred forty-six".