1661045122 has 32 divisors (see below), whose sum is σ = 2864911680. Its totient is φ = 715216320.

The previous prime is 1661045083. The next prime is 1661045147. The reversal of 1661045122 is 2215401661.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9253 + ... + 58375.

It is an arithmetic number, because the mean of its divisors is an integer number (89528490).

Almost surely, 2^1661045122 is an apocalyptic number.

1661045122 is a deficient number, since it is larger than the sum of its proper divisors (1203866558).

1661045122 is a wasteful number, since it uses less digits than its factorization.

1661045122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49218.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1661045122 is about 40755.9213121235. The cubic root of 1661045122 is about 1184.2965843215.

Adding to 1661045122 its reverse (2215401661), we get a palindrome (3876446783).

The spelling of 1661045122 in words is "one billion, six hundred sixty-one million, forty-five thousand, one hundred twenty-two".