1161001564 has 24 divisors (see below), whose sum is σ = 2044643328. Its totient is φ = 576830640.

The previous prime is 1161001561. The next prime is 1161001571. The reversal of 1161001564 is 4651001611.

It is a super-2 number, since 2×1161001564² = 2695849263220892192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161001561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455277 + ... + 457819.

It is an arithmetic number, because the mean of its divisors is an integer number (85193472).

Almost surely, 2^1161001564 is an apocalyptic number.

It is an amenable number.

1161001564 is a deficient number, since it is larger than the sum of its proper divisors (883641764).

1161001564 is a wasteful number, since it uses less digits than its factorization.

1161001564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3225 (or 3223 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1161001564 is about 34073.4730252142. The cubic root of 1161001564 is about 1051.0198900637.

The spelling of 1161001564 in words is "one billion, one hundred sixty-one million, one thousand, five hundred sixty-four".