649169807406 has 16 divisors (see below), whose sum is σ = 1303391523024. Its totient is φ = 215547951104.

The previous prime is 649169807393. The next prime is 649169807483. The reversal of 649169807406 is 604708961946.

It is a self number, because there is not a number n which added to its sum of digits gives 649169807406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210494505 + ... + 210497588.

It is an arithmetic number, because the mean of its divisors is an integer number (81461970189).

Almost surely, 2^649169807406 is an apocalyptic number.

649169807406 is an abundant number, since it is smaller than the sum of its proper divisors (654221715618).

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

649169807406 is a wasteful number, since it uses less digits than its factorization.

649169807406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420992355.

The product of its (nonzero) digits is 15676416, while the sum is 60.

The spelling of 649169807406 in words is "six hundred forty-nine billion, one hundred sixty-nine million, eight hundred seven thousand, four hundred six".