1864665064 has 8 divisors (see below), whose sum is σ = 3496247010. Its totient is φ = 932332528.

The previous prime is 1864665031. The next prime is 1864665107. The reversal of 1864665064 is 4605664681.

It can be written as a sum of positive squares in only one way, i.e., 1408500900 + 456164164 = 37530^2 + 21358^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116541559 + ... + 116541574.

Almost surely, 2^1864665064 is an apocalyptic number.

It is an amenable number.

1864665064 is a deficient number, since it is larger than the sum of its proper divisors (1631581946).

1864665064 is a wasteful number, since it uses less digits than its factorization.

1864665064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233083139 (or 233083135 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 46.

The square root of 1864665064 is about 43181.7677266691. The cubic root of 1864665064 is about 1230.8362489155.

The spelling of 1864665064 in words is "one billion, eight hundred sixty-four million, six hundred sixty-five thousand, sixty-four".