650744064 has 144 divisors (see below), whose sum is σ = 1987095040. Its totient is φ = 209848320.

The previous prime is 650744047. The next prime is 650744077. The reversal of 650744064 is 460447056.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-3 number, since 3×650744064³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212754 + ... + 215790.

Almost surely, 2^650744064 is an apocalyptic number.

650744064 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 650744064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (993547520).

650744064 is an abundant number, since it is smaller than the sum of its proper divisors (1336350976).

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

650744064 is a wasteful number, since it uses less digits than its factorization.

650744064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3093 (or 3073 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 650744064 is about 25509.6856899492. The cubic root of 650744064 is about 866.5695112655.

The spelling of 650744064 in words is "six hundred fifty million, seven hundred forty-four thousand, sixty-four".