649359953946 has 48 divisors (see below), whose sum is σ = 1545015446208. Its totient is φ = 195472584000.

The previous prime is 649359953927. The next prime is 649359953953.

It is a happy number.

649359953946 is a `hidden beast` number, since 6 + 49 + 3 + 5 + 9 + 9 + 539 + 46 = 666.

649359953946 is nontrivially palindromic in base 10.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10829691 + ... + 10889486.

It is an arithmetic number, because the mean of its divisors is an integer number (32187821796).

Almost surely, 2^649359953946 is an apocalyptic number.

649359953946 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

649359953946 is an abundant number, since it is smaller than the sum of its proper divisors (895655492262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649359953946 is a wasteful number, since it uses less digits than its factorization.

649359953946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21719347 (or 21719344 counting only the distinct ones).

The product of its digits is 850305600, while the sum is 72.

The spelling of 649359953946 in words is "six hundred forty-nine billion, three hundred fifty-nine million, nine hundred fifty-three thousand, nine hundred forty-six".