1216095849 has 20 divisors (see below), whose sum is σ = 1829723280. Its totient is φ = 804890520.

The previous prime is 1216095827. The next prime is 1216095863. The reversal of 1216095849 is 9485906121.

1216095849 is a `hidden beast` number, since 1 + 2 + 1 + 60 + 9 + 584 + 9 = 666.

It is not a de Polignac number, because 1216095849 - 2⁸ = 1216095593 is a prime.

It is a super-2 number, since 2×1216095849² = 2957778227910061602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1216095809) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 42747 + ... + 65264.

It is an arithmetic number, because the mean of its divisors is an integer number (91486164).

Almost surely, 2^1216095849 is an apocalyptic number.

It is an amenable number.

1216095849 is a deficient number, since it is larger than the sum of its proper divisors (613627431).

1216095849 is a wasteful number, since it uses less digits than its factorization.

1216095849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108162 (or 108153 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 1216095849 is about 34872.5658505364. The cubic root of 1216095849 is about 1067.3887030096.

The spelling of 1216095849 in words is "one billion, two hundred sixteen million, ninety-five thousand, eight hundred forty-nine".