648134816 has 48 divisors (see below), whose sum is σ = 1466035200. Its totient is φ = 276299520.

The previous prime is 648134801. The next prime is 648134863. The reversal of 648134816 is 618431846.

It is a super-2 number, since 2×648134816² = 840157479422707712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35210 + ... + 50358.

It is an arithmetic number, because the mean of its divisors is an integer number (30542400).

Almost surely, 2^648134816 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 648134816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (733017600).

648134816 is an abundant number, since it is smaller than the sum of its proper divisors (817900384).

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

648134816 is a wasteful number, since it uses less digits than its factorization.

648134816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15357 (or 15349 counting only the distinct ones).

The product of its digits is 110592, while the sum is 41.

The square root of 648134816 is about 25458.4920213276. The cubic root of 648134816 is about 865.4097498497.

The spelling of 648134816 in words is "six hundred forty-eight million, one hundred thirty-four thousand, eight hundred sixteen".