1165550501 has 8 divisors (see below), whose sum is σ = 1203385344. Its totient is φ = 1128163680.

The previous prime is 1165550489. The next prime is 1165550521. The reversal of 1165550501 is 1050555611.

It is a happy number.

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 1165550501 - 2²⁶ = 1098441637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165550521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106715 + ... + 117128.

It is an arithmetic number, because the mean of its divisors is an integer number (150423168).

Almost surely, 2^1165550501 is an apocalyptic number.

It is an amenable number.

1165550501 is a deficient number, since it is larger than the sum of its proper divisors (37834843).

1165550501 is a wasteful number, since it uses less digits than its factorization.

1165550501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224011.

The product of its (nonzero) digits is 3750, while the sum is 29.

The square root of 1165550501 is about 34140.1596510620. The cubic root of 1165550501 is about 1052.3907732653.

The spelling of 1165550501 in words is "one billion, one hundred sixty-five million, five hundred fifty thousand, five hundred one".