221964764730 has 16 divisors (see below), whose sum is σ = 532715435424. Its totient is φ = 59190603920.

The previous prime is 221964764701. The next prime is 221964764771. The reversal of 221964764730 is 37467469122.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3699412716 + ... + 3699412775.

It is an arithmetic number, because the mean of its divisors is an integer number (33294714714).

Almost surely, 2^221964764730 is an apocalyptic number.

221964764730 is an abundant number, since it is smaller than the sum of its proper divisors (310750670694).

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

221964764730 is a wasteful number, since it uses less digits than its factorization.

221964764730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7398825501.

The product of its (nonzero) digits is 3048192, while the sum is 51.

The spelling of 221964764730 in words is "two hundred twenty-one billion, nine hundred sixty-four million, seven hundred sixty-four thousand, seven hundred thirty".