648247680 has 96 divisors (see below), whose sum is σ = 2238500160. Its totient is φ = 172864512.

The previous prime is 648247673. The next prime is 648247687. The reversal of 648247680 is 86742846.

It is an interprime number because it is at equal distance from previous prime (648247673) and next prime (648247687).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648247687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50512 + ... + 62031.

It is an arithmetic number, because the mean of its divisors is an integer number (23317710).

Almost surely, 2^648247680 is an apocalyptic number.

648247680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

648247680 is an abundant number, since it is smaller than the sum of its proper divisors (1590252480).

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

648247680 is a wasteful number, since it uses less digits than its factorization.

648247680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112568 (or 112553 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The square root of 648247680 is about 25460.7085525914. The cubic root of 648247680 is about 865.4599801077.

The spelling of 648247680 in words is "six hundred forty-eight million, two hundred forty-seven thousand, six hundred eighty".