648345274500 has 384 divisors, whose sum is σ = 2477742059520. Its totient is φ = 127630080000.

The previous prime is 648345274453. The next prime is 648345274553. The reversal of 648345274500 is 5472543846.

It is a self number, because there is not a number n which added to its sum of digits gives 648345274500.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2046780 + ... + 2342220.

It is an arithmetic number, because the mean of its divisors is an integer number (6452453280).

Almost surely, 2^648345274500 is an apocalyptic number.

648345274500 is a gapful number since it is divisible by the number (60) 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 648345274500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1238871029760).

648345274500 is an abundant number, since it is smaller than the sum of its proper divisors (1829396785020).

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

648345274500 is a wasteful number, since it uses less digits than its factorization.

648345274500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295500 (or 295488 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 48.

The spelling of 648345274500 in words is "six hundred forty-eight billion, three hundred forty-five million, two hundred seventy-four thousand, five hundred".