64506802099 has 4 divisors (see below), whose sum is σ = 65564290720. Its totient is φ = 63449313480.

The previous prime is 64506802049. The next prime is 64506802159. The reversal of 64506802099 is 99020860546.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 64506802099 - 2¹⁷ = 64506671027 is a prime.

It is a super-2 number, since 2×64506802099² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64506802049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 528744219 + ... + 528744340.

It is an arithmetic number, because the mean of its divisors is an integer number (16391072680).

Almost surely, 2^64506802099 is an apocalyptic number.

64506802099 is a deficient number, since it is larger than the sum of its proper divisors (1057488621).

64506802099 is a wasteful number, since it uses less digits than its factorization.

64506802099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057488620.

The product of its (nonzero) digits is 933120, while the sum is 49.

The spelling of 64506802099 in words is "sixty-four billion, five hundred six million, eight hundred two thousand, ninety-nine".