649734821682 has 32 divisors (see below), whose sum is σ = 1334909294784. Its totient is φ = 210674462400.

The previous prime is 649734821653. The next prime is 649734821683. The reversal of 649734821682 is 286128437946.

It is a super-2 number, since 2×649734821682² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (649734821683) 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, 587332 + ... + 1282352.

It is an arithmetic number, because the mean of its divisors is an integer number (41715915462).

Almost surely, 2^649734821682 is an apocalyptic number.

649734821682 is an abundant number, since it is smaller than the sum of its proper divisors (685174473102).

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

649734821682 is a wasteful number, since it uses less digits than its factorization.

649734821682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699274.

The product of its digits is 27869184, while the sum is 60.

The spelling of 649734821682 in words is "six hundred forty-nine billion, seven hundred thirty-four million, eight hundred twenty-one thousand, six hundred eighty-two".