1161146645 has 4 divisors (see below), whose sum is σ = 1393375980. Its totient is φ = 928917312.

The previous prime is 1161146641. The next prime is 1161146669. The reversal of 1161146645 is 5466411611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 572453476 + 588693169 = 23926^2 + 24263^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161146645 - 2² = 1161146641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161146641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116114660 + ... + 116114669.

It is an arithmetic number, because the mean of its divisors is an integer number (348343995).

Almost surely, 2^1161146645 is an apocalyptic number.

It is an amenable number.

1161146645 is a deficient number, since it is larger than the sum of its proper divisors (232229335).

1161146645 is an equidigital number, since it uses as much as digits as its factorization.

1161146645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232229334.

The product of its digits is 17280, while the sum is 35.

The square root of 1161146645 is about 34075.6019022408. The cubic root of 1161146645 is about 1051.0636673993.

The spelling of 1161146645 in words is "one billion, one hundred sixty-one million, one hundred forty-six thousand, six hundred forty-five".