1155797615 has 32 divisors (see below), whose sum is σ = 1682601984. Its totient is φ = 744030720.

The previous prime is 1155797611. The next prime is 1155797651. The reversal of 1155797615 is 5167975511.

It is a happy number.

It is not a de Polignac number, because 1155797615 - 2² = 1155797611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1155797615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155797611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 254192 + ... + 258698.

It is an arithmetic number, because the mean of its divisors is an integer number (52581312).

Almost surely, 2^1155797615 is an apocalyptic number.

1155797615 is a deficient number, since it is larger than the sum of its proper divisors (526804369).

1155797615 is a wasteful number, since it uses less digits than its factorization.

1155797615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4967.

The product of its digits is 330750, while the sum is 47.

The square root of 1155797615 is about 33997.0236197229. The cubic root of 1155797615 is about 1049.4472116728.

The spelling of 1155797615 in words is "one billion, one hundred fifty-five million, seven hundred ninety-seven thousand, six hundred fifteen".