648556146 has 160 divisors (see below), whose sum is σ = 1806520320. Its totient is φ = 169711200.

The previous prime is 648556141. The next prime is 648556151. The reversal of 648556146 is 641655846.

648556146 is a `hidden beast` number, since 6 + 4 + 85 + 561 + 4 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (648556141) and next prime (648556151).

It is not an unprimeable number, because it can be changed into a prime (648556141) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 667441 + ... + 668411.

It is an arithmetic number, because the mean of its divisors is an integer number (11290752).

Almost surely, 2^648556146 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648556146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (903260160).

648556146 is an abundant number, since it is smaller than the sum of its proper divisors (1157964174).

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

648556146 is a wasteful number, since it uses less digits than its factorization.

648556146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042 (or 1033 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The square root of 648556146 is about 25466.7655190054. The cubic root of 648556146 is about 865.5972335335.

The spelling of 648556146 in words is "six hundred forty-eight million, five hundred fifty-six thousand, one hundred forty-six".