649734673164 has 48 divisors (see below), whose sum is σ = 1557231206496. Its totient is φ = 210696422400.

The previous prime is 649734673163. The next prime is 649734673171. The reversal of 649734673164 is 461376437946.

It is a junction number, because it is equal to n+sod(n) for n = 649734673098 and 649734673107.

It is not an unprimeable number, because it can be changed into a prime (649734673163) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3342484 + ... + 3531524.

It is an arithmetic number, because the mean of its divisors is an integer number (32442316802).

Almost surely, 2^649734673164 is an apocalyptic number.

It is an amenable number.

649734673164 is an abundant number, since it is smaller than the sum of its proper divisors (907496533332).

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

649734673164 is a wasteful number, since it uses less digits than its factorization.

649734673164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196826 (or 196824 counting only the distinct ones).

The product of its digits is 54867456, while the sum is 60.

The spelling of 649734673164 in words is "six hundred forty-nine billion, seven hundred thirty-four million, six hundred seventy-three thousand, one hundred sixty-four".