2145869618 has 16 divisors (see below), whose sum is σ = 3283493760. Its totient is φ = 1051420656.

The previous prime is 2145869611. The next prime is 2145869623. The reversal of 2145869618 is 8169685412.

It is not an unprimeable number, because it can be changed into a prime (2145869611) 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, 79271 + ... + 102837.

It is an arithmetic number, because the mean of its divisors is an integer number (205218360).

Almost surely, 2^2145869618 is an apocalyptic number.

2145869618 is a deficient number, since it is larger than the sum of its proper divisors (1137624142).

2145869618 is a wasteful number, since it uses less digits than its factorization.

2145869618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24481.

The product of its digits is 829440, while the sum is 50.

The square root of 2145869618 is about 46323.5320112791. The cubic root of 2145869618 is about 1289.8358499542.

The spelling of 2145869618 in words is "two billion, one hundred forty-five million, eight hundred sixty-nine thousand, six hundred eighteen".