648345921090 has 96 divisors (see below), whose sum is σ = 1810283100480. Its totient is φ = 148176395136.

The previous prime is 648345921073. The next prime is 648345921133. The reversal of 648345921090 is 90129543846.

648345921090 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16507596 + ... + 16546824.

It is an arithmetic number, because the mean of its divisors is an integer number (18857115630).

Almost surely, 2^648345921090 is an apocalyptic number.

648345921090 is an abundant number, since it is smaller than the sum of its proper divisors (1161937179390).

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

648345921090 is a wasteful number, since it uses less digits than its factorization.

648345921090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50496 (or 50489 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 648345921090 in words is "six hundred forty-eight billion, three hundred forty-five million, nine hundred twenty-one thousand, ninety".