1156645532 has 12 divisors (see below), whose sum is σ = 2313291120. Its totient is φ = 495705216.

The previous prime is 1156645531. The next prime is 1156645559. The reversal of 1156645532 is 2355466511.

1156645532 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156645531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20654357 + ... + 20654412.

It is an arithmetic number, because the mean of its divisors is an integer number (192774260).

Almost surely, 2^1156645532 is an apocalyptic number.

It is an amenable number.

1156645532 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1156645532 is a wasteful number, since it uses less digits than its factorization.

1156645532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41308780 (or 41308778 counting only the distinct ones).

The product of its digits is 108000, while the sum is 38.

The square root of 1156645532 is about 34009.4917927334. The cubic root of 1156645532 is about 1049.7037809908.

The spelling of 1156645532 in words is "one billion, one hundred fifty-six million, six hundred forty-five thousand, five hundred thirty-two".