1161565053 has 8 divisors (see below), whose sum is σ = 1689549216. Its totient is φ = 703978800.

The previous prime is 1161565051. The next prime is 1161565061. The reversal of 1161565053 is 3505651611.

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

It is not a de Polignac number, because 1161565053 - 2¹ = 1161565051 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 35198941 = 1161565053 / (1 + 1 + 6 + 1 + 5 + 6 + 5 + 0 + 5 + 3).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161565051) 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, 17599438 + ... + 17599503.

It is an arithmetic number, because the mean of its divisors is an integer number (211193652).

Almost surely, 2^1161565053 is an apocalyptic number.

It is an amenable number.

1161565053 is a deficient number, since it is larger than the sum of its proper divisors (527984163).

1161565053 is a wasteful number, since it uses less digits than its factorization.

1161565053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35198955.

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 1161565053 is about 34081.7407565987. The cubic root of 1161565053 is about 1051.1898991252.

The spelling of 1161565053 in words is "one billion, one hundred sixty-one million, five hundred sixty-five thousand, fifty-three".