643465350 has 96 divisors (see below), whose sum is σ = 1934340480. Its totient is φ = 155988000.

The previous prime is 643465337. The next prime is 643465363. The reversal of 643465350 is 53564346.

643465350 is a `hidden beast` number, since 643 + 4 + 6 + 5 + 3 + 5 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (643465337) and next prime (643465363).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6816 + ... + 36515.

It is an arithmetic number, because the mean of its divisors is an integer number (20149380).

Almost surely, 2^643465350 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 643465350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (967170240).

643465350 is an abundant number, since it is smaller than the sum of its proper divisors (1290875130).

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

643465350 is a wasteful number, since it uses less digits than its factorization.

643465350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43363 (or 43352 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

The square root of 643465350 is about 25366.6188129203. The cubic root of 643465350 is about 863.3264667873.

It can be divided in two parts, 64346 and 5350, that added together give a palindrome (69696).

The spelling of 643465350 in words is "six hundred forty-three million, four hundred sixty-five thousand, three hundred fifty".