649864468946 has 32 divisors (see below), whose sum is σ = 1254535188480. Its totient is φ = 245026400400.

The previous prime is 649864468943. The next prime is 649864468969.

649864468946 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (649864468943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68058116 + ... + 68067663.

It is an arithmetic number, because the mean of its divisors is an integer number (39204224640).

Almost surely, 2^649864468946 is an apocalyptic number.

649864468946 is a deficient number, since it is larger than the sum of its proper divisors (604670719534).

649864468946 is a wasteful number, since it uses less digits than its factorization.

649864468946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136125830.

The product of its digits is 1719926784, while the sum is 74.

The spelling of 649864468946 in words is "six hundred forty-nine billion, eight hundred sixty-four million, four hundred sixty-eight thousand, nine hundred forty-six".