221555077650764 has 96 divisors (see below), whose sum is σ = 457086962122560. Its totient is φ = 92637816422400.

The previous prime is 221555077650763. The next prime is 221555077650769. The reversal of 221555077650764 is 467056770555122.

It is a super-2 number, since 2×221555077650764² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221555077650697 and 221555077650706.

It is not an unprimeable number, because it can be changed into a prime (221555077650761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202232852 + ... + 203325444.

It is an arithmetic number, because the mean of its divisors is an integer number (4761322522110).

Almost surely, 2^{221555077650764} is an apocalyptic number.

It is an amenable number.

221555077650764 is an abundant number, since it is smaller than the sum of its proper divisors (235531884471796).

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

221555077650764 is a wasteful number, since it uses less digits than its factorization.

221555077650764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093851 (or 1093849 counting only the distinct ones).

The product of its (nonzero) digits is 123480000, while the sum is 62.

The spelling of 221555077650764 in words is "two hundred twenty-one trillion, five hundred fifty-five billion, seventy-seven million, six hundred fifty thousand, seven hundred sixty-four".