648074064 has 120 divisors (see below), whose sum is σ = 1851853696. Its totient is φ = 195148800.

The previous prime is 648074033. The next prime is 648074083. The reversal of 648074064 is 460470846.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1399497 + ... + 1399959.

Almost surely, 2^648074064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648074064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (925926848).

648074064 is an abundant number, since it is smaller than the sum of its proper divisors (1203779632).

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

648074064 is a wasteful number, since it uses less digits than its factorization.

648074064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737 (or 720 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 39.

The square root of 648074064 is about 25457.2988355010. The cubic root of 648074064 is about 865.3827096853.

The spelling of 648074064 in words is "six hundred forty-eight million, seventy-four thousand, sixty-four".