1165615601 has 8 divisors (see below), whose sum is σ = 1188197280. Its totient is φ = 1143212832.

The previous prime is 1165615579. The next prime is 1165615603. The reversal of 1165615601 is 1065165611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1165615601 - 2⁶ = 1165615537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1165615603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31535 + ... + 57668.

It is an arithmetic number, because the mean of its divisors is an integer number (148524660).

Almost surely, 2^1165615601 is an apocalyptic number.

It is an amenable number.

1165615601 is a deficient number, since it is larger than the sum of its proper divisors (22581679).

1165615601 is an equidigital number, since it uses as much as digits as its factorization.

1165615601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89455.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 1165615601 is about 34141.1130603558. The cubic root of 1165615601 is about 1052.4103661140.

The spelling of 1165615601 in words is "one billion, one hundred sixty-five million, six hundred fifteen thousand, six hundred one".