648195540 has 24 divisors (see below), whose sum is σ = 1814947680. Its totient is φ = 172852128.

The previous prime is 648195529. The next prime is 648195589. The reversal of 648195540 is 45591846.

648195540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 648195492 and 648195501.

It is a congruent number.

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, 5401570 + ... + 5401689.

It is an arithmetic number, because the mean of its divisors is an integer number (75622820).

Almost surely, 2^648195540 is an apocalyptic number.

648195540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

648195540 is an abundant number, since it is smaller than the sum of its proper divisors (1166752140).

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

648195540 is a wasteful number, since it uses less digits than its factorization.

648195540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10803271 (or 10803269 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 648195540 is about 25459.6846013457. The cubic root of 648195540 is about 865.4367758630.

The spelling of 648195540 in words is "six hundred forty-eight million, one hundred ninety-five thousand, five hundred forty".