1045111661 has 4 divisors (see below), whose sum is σ = 1140121824. Its totient is φ = 950101500.

The previous prime is 1045111621. The next prime is 1045111687. The reversal of 1045111661 is 1661115401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1045111661 - 2²² = 1040917357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1045111661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045111621) 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 3 ways as a sum of consecutive naturals, for example, 47505065 + ... + 47505086.

It is an arithmetic number, because the mean of its divisors is an integer number (285030456).

Almost surely, 2^1045111661 is an apocalyptic number.

1045111661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1045111661 is a deficient number, since it is larger than the sum of its proper divisors (95010163).

1045111661 is an equidigital number, since it uses as much as digits as its factorization.

1045111661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95010162.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 1045111661 is about 32328.1867880028. The cubic root of 1045111661 is about 1014.8166043310.

The spelling of 1045111661 in words is "one billion, forty-five million, one hundred eleven thousand, six hundred sixty-one".