222728587221785 has 16 divisors (see below), whose sum is σ = 273793764142080. Its totient is φ = 173836581682560.

The previous prime is 222728587221737. The next prime is 222728587221799. The reversal of 222728587221785 is 587122785827222.

It is a de Polignac number, because none of the positive numbers 2^k-222728587221785 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138601736 + ... + 140199494.

It is an arithmetic number, because the mean of its divisors is an integer number (17112110258880).

Almost surely, 2^{222728587221785} is an apocalyptic number.

It is an amenable number.

222728587221785 is a deficient number, since it is larger than the sum of its proper divisors (51065176920295).

222728587221785 is a wasteful number, since it uses less digits than its factorization.

222728587221785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2277808.

The product of its digits is 280985600, while the sum is 68.

The spelling of 222728587221785 in words is "two hundred twenty-two trillion, seven hundred twenty-eight billion, five hundred eighty-seven million, two hundred twenty-one thousand, seven hundred eighty-five".