649393393946 has 16 divisors (see below), whose sum is σ = 1080654648480. Its totient is φ = 290175784080.

The previous prime is 649393393877. The next prime is 649393393949.

It is a happy number.

649393393946 is nontrivially palindromic in base 10.

649393393946 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (649393393949) 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, 250150241 + ... + 250152836.

It is an arithmetic number, because the mean of its divisors is an integer number (67540915530).

Almost surely, 2^649393393946 is an apocalyptic number.

649393393946 is a deficient number, since it is larger than the sum of its proper divisors (431261254534).

649393393946 is a wasteful number, since it uses less digits than its factorization.

649393393946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500303149.

The product of its digits is 306110016, while the sum is 68.

It can be divided in two parts, 6493 and 93393946, that added together give a palindrome (93400439).

The spelling of 649393393946 in words is "six hundred forty-nine billion, three hundred ninety-three million, three hundred ninety-three thousand, nine hundred forty-six".