1161016645 has 8 divisors (see below), whose sum is σ = 1393860600. Its totient is φ = 928386240.

The previous prime is 1161016613. The next prime is 1161016657. The reversal of 1161016645 is 5466101611.

It can be written as a sum of positive squares in 4 ways, for example, as 134583201 + 1026433444 = 11601^2 + 32038^2 .

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

It is not a de Polignac number, because 1161016645 - 2⁵ = 1161016613 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41170 + ... + 63379.

It is an arithmetic number, because the mean of its divisors is an integer number (174232575).

Almost surely, 2^1161016645 is an apocalyptic number.

It is an amenable number.

1161016645 is a deficient number, since it is larger than the sum of its proper divisors (232843955).

1161016645 is a wasteful number, since it uses less digits than its factorization.

1161016645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106775.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1161016645 is about 34073.6943256818. The cubic root of 1161016645 is about 1051.0244408363.

The spelling of 1161016645 in words is "one billion, one hundred sixty-one million, sixteen thousand, six hundred forty-five".