1156689812 has 24 divisors (see below), whose sum is σ = 2033539200. Its totient is φ = 575686656.

The previous prime is 1156689773. The next prime is 1156689817. The reversal of 1156689812 is 2189866511.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156689817) 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, 1503764 + ... + 1504532.

It is an arithmetic number, because the mean of its divisors is an integer number (84730800).

Almost surely, 2^1156689812 is an apocalyptic number.

It is an amenable number.

1156689812 is a deficient number, since it is larger than the sum of its proper divisors (876849388).

1156689812 is a wasteful number, since it uses less digits than its factorization.

1156689812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2015 (or 2013 counting only the distinct ones).

The product of its digits is 207360, while the sum is 47.

The square root of 1156689812 is about 34010.1427812351. The cubic root of 1156689812 is about 1049.7171761319.

The spelling of 1156689812 in words is "one billion, one hundred fifty-six million, six hundred eighty-nine thousand, eight hundred twelve".