643265150216 has 48 divisors (see below), whose sum is σ = 1351073463300. Its totient is φ = 286653948672.

The previous prime is 643265150201. The next prime is 643265150219. The reversal of 643265150216 is 612051562346.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 72439569316 + 570825580900 = 269146^2 + 755530^2 .

It is not an unprimeable number, because it can be changed into a prime (643265150219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8164031 + ... + 8242446.

Almost surely, 2^643265150216 is an apocalyptic number.

It is an amenable number.

643265150216 is an abundant number, since it is smaller than the sum of its proper divisors (707808313084).

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

643265150216 is a wasteful number, since it uses less digits than its factorization.

643265150216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16406538 (or 16406521 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 643265150216 in words is "six hundred forty-three billion, two hundred sixty-five million, one hundred fifty thousand, two hundred sixteen".