5642665064 has 16 divisors (see below), whose sum is σ = 10618196100. Its totient is φ = 2811146112.

The previous prime is 5642665037. The next prime is 5642665079. The reversal of 5642665064 is 4605662465.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5453822500 + 188842564 = 73850^2 + 13742^2 .

It is a super-2 number, since 2×5642665064² = 63679338048972248192, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1270949 + ... + 1275380.

Almost surely, 2^5642665064 is an apocalyptic number.

It is an amenable number.

5642665064 is a deficient number, since it is larger than the sum of its proper divisors (4975531036).

5642665064 is a wasteful number, since it uses less digits than its factorization.

5642665064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2546612 (or 2546608 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 44.

The square root of 5642665064 is about 75117.6747776447. The cubic root of 5642665064 is about 1780.3064178122.

The spelling of 5642665064 in words is "five billion, six hundred forty-two million, six hundred sixty-five thousand, sixty-four".