646062500642 has 16 divisors (see below), whose sum is σ = 1071845896632. Its totient is φ = 290123700480.

The previous prime is 646062500641. The next prime is 646062500651. The reversal of 646062500642 is 246005260646.

It can be written as a sum of positive squares in 4 ways, for example, as 646060680841 + 1819801 = 803779^2 + 1349^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 646062500642.

It is not an unprimeable number, because it can be changed into a prime (646062500641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335790359 + ... + 335792282.

Almost surely, 2^646062500642 is an apocalyptic number.

646062500642 is a deficient number, since it is larger than the sum of its proper divisors (425783395990).

646062500642 is a wasteful number, since it uses less digits than its factorization.

646062500642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671582693.

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 646062500642 in words is "six hundred forty-six billion, sixty-two million, five hundred thousand, six hundred forty-two".