1145961836 has 24 divisors (see below), whose sum is σ = 2042742576. Its totient is φ = 562383360.

The previous prime is 1145961833. The next prime is 1145961881. The reversal of 1145961836 is 6381695411.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1145961833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67700 + ... + 82916.

It is an arithmetic number, because the mean of its divisors is an integer number (85114274).

Almost surely, 2^1145961836 is an apocalyptic number.

It is an amenable number.

1145961836 is a deficient number, since it is larger than the sum of its proper divisors (896780740).

1145961836 is a wasteful number, since it uses less digits than its factorization.

1145961836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15569 (or 15567 counting only the distinct ones).

The product of its digits is 155520, while the sum is 44.

The square root of 1145961836 is about 33852.0580762825. The cubic root of 1145961836 is about 1046.4618129024.

The spelling of 1145961836 in words is "one billion, one hundred forty-five million, nine hundred sixty-one thousand, eight hundred thirty-six".