1161915616 has 24 divisors (see below), whose sum is σ = 2288684160. Its totient is φ = 580662528.

The previous prime is 1161915583. The next prime is 1161915649. The reversal of 1161915616 is 6165191611.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1161915583) and next prime (1161915649).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63540 + ... + 79756.

It is an arithmetic number, because the mean of its divisors is an integer number (95361840).

Almost surely, 2^1161915616 is an apocalyptic number.

1161915616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1161915616 is a deficient number, since it is larger than the sum of its proper divisors (1126768544).

1161915616 is a wasteful number, since it uses less digits than its factorization.

1161915616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18466 (or 18458 counting only the distinct ones).

The product of its digits is 9720, while the sum is 37.

The square root of 1161915616 is about 34086.8833424237. The cubic root of 1161915616 is about 1051.2956389967.

The spelling of 1161915616 in words is "one billion, one hundred sixty-one million, nine hundred fifteen thousand, six hundred sixteen".