649750580 has 24 divisors (see below), whose sum is σ = 1365305760. Its totient is φ = 259742240.

The previous prime is 649750571. The next prime is 649750583. The reversal of 649750580 is 85057946.

It is a super-3 number, since 3×649750580³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649750583) 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, 27251 + ... + 45189.

It is an arithmetic number, because the mean of its divisors is an integer number (56887740).

Almost surely, 2^649750580 is an apocalyptic number.

It is an amenable number.

649750580 is an abundant number, since it is smaller than the sum of its proper divisors (715555180).

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

649750580 is a wasteful number, since it uses less digits than its factorization.

649750580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19759 (or 19757 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 649750580 is about 25490.2055699831. The cubic root of 649750580 is about 866.1282925209.

The spelling of 649750580 in words is "six hundred forty-nine million, seven hundred fifty thousand, five hundred eighty".