649338833946 has 64 divisors (see below), whose sum is σ = 1465772215680. Its totient is φ = 189960879360.

The previous prime is 649338833921. The next prime is 649338833953.

649338833946 is nontrivially palindromic in base 10.

649338833946 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21262680 + ... + 21293196.

It is an arithmetic number, because the mean of its divisors is an integer number (22902690870).

Almost surely, 2^649338833946 is an apocalyptic number.

649338833946 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

649338833946 is an abundant number, since it is smaller than the sum of its proper divisors (816433381734).

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

649338833946 is a wasteful number, since it uses less digits than its factorization.

649338833946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41679.

The product of its digits is 241864704, while the sum is 66.

The spelling of 649338833946 in words is "six hundred forty-nine billion, three hundred thirty-eight million, eight hundred thirty-three thousand, nine hundred forty-six".