1151561116 has 18 divisors (see below), whose sum is σ = 2087125040. Its totient is φ = 555924432.

The previous prime is 1151561107. The next prime is 1151561119. The reversal of 1151561116 is 6111651511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151561119) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 167796 + ... + 174523.

Almost surely, 2^1151561116 is an apocalyptic number.

It is an amenable number.

1151561116 is a deficient number, since it is larger than the sum of its proper divisors (935563924).

1151561116 is a wasteful number, since it uses less digits than its factorization.

1151561116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342381 (or 342350 counting only the distinct ones).

The product of its digits is 900, while the sum is 28.

The square root of 1151561116 is about 33934.6595091213. The cubic root of 1151561116 is about 1048.1634156045.

The spelling of 1151561116 in words is "one billion, one hundred fifty-one million, five hundred sixty-one thousand, one hundred sixteen".