649671536854 has 16 divisors (see below), whose sum is σ = 984260432160. Its totient is φ = 321585409600.

The previous prime is 649671536851. The next prime is 649671536867. The reversal of 649671536854 is 458635176946.

649671536854 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649671536851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1791207 + ... + 2123149.

It is an arithmetic number, because the mean of its divisors is an integer number (61516277010).

Almost surely, 2^649671536854 is an apocalyptic number.

649671536854 is a deficient number, since it is larger than the sum of its proper divisors (334588895306).

649671536854 is a wasteful number, since it uses less digits than its factorization.

649671536854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341735.

The product of its digits is 130636800, while the sum is 64.

The spelling of 649671536854 in words is "six hundred forty-nine billion, six hundred seventy-one million, five hundred thirty-six thousand, eight hundred fifty-four".