649164544 has 72 divisors (see below), whose sum is σ = 1511333600. Its totient is φ = 278175744.

The previous prime is 649164539. The next prime is 649164577. The reversal of 649164544 is 445461946.

It is a self number, because there is not a number n which added to its sum of digits gives 649164544.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84112 + ... + 91504.

Almost surely, 2^649164544 is an apocalyptic number.

649164544 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649164544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (755666800).

649164544 is an abundant number, since it is smaller than the sum of its proper divisors (862169056).

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

649164544 is an frugal number, since it uses more digits than its factorization.

649164544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7430 (or 7402 counting only the distinct ones).

The product of its digits is 414720, while the sum is 43.

The square root of 649164544 is about 25478.7076595341. The cubic root of 649164544 is about 865.8678156266.

The spelling of 649164544 in words is "six hundred forty-nine million, one hundred sixty-four thousand, five hundred forty-four".