648169452 has 216 divisors, whose sum is σ = 2044922880. Its totient is φ = 178809120.

The previous prime is 648169447. The next prime is 648169453. The reversal of 648169452 is 254961846.

648169452 is a `hidden beast` number, since 64 + 81 + 69 + 452 = 666.

648169452 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 = 648169398 and 648169407.

It is not an unprimeable number, because it can be changed into a prime (648169453) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1476249 + ... + 1476687.

Almost surely, 2^648169452 is an apocalyptic number.

648169452 is a gapful number since it is divisible by the number (62) 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 648169452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1022461440).

648169452 is an abundant number, since it is smaller than the sum of its proper divisors (1396753428).

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

648169452 is a wasteful number, since it uses less digits than its factorization.

648169452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503 (or 482 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 648169452 is about 25459.1722567722. The cubic root of 648169452 is about 865.4251652630.

The spelling of 648169452 in words is "six hundred forty-eight million, one hundred sixty-nine thousand, four hundred fifty-two".