1155149916 has 96 divisors (see below), whose sum is σ = 2936640000. Its totient is φ = 352159488.

The previous prime is 1155149911. The next prime is 1155149917. The reversal of 1155149916 is 6199415511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155149911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1256505 + ... + 1257423.

It is an arithmetic number, because the mean of its divisors is an integer number (30590000).

Almost surely, 2^1155149916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1155149916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1468320000).

1155149916 is an abundant number, since it is smaller than the sum of its proper divisors (1781490084).

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

1155149916 is a wasteful number, since it uses less digits than its factorization.

1155149916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131 (or 1129 counting only the distinct ones).

The product of its digits is 48600, while the sum is 42.

The square root of 1155149916 is about 33987.4964656122. The cubic root of 1155149916 is about 1049.2511413254.

The spelling of 1155149916 in words is "one billion, one hundred fifty-five million, one hundred forty-nine thousand, nine hundred sixteen".