221431426066064 has 40 divisors (see below), whose sum is σ = 439002880261440. Its totient is φ = 108140386048128.

The previous prime is 221431426066061. The next prime is 221431426066073. The reversal of 221431426066064 is 460660624134122.

It is not an unprimeable number, because it can be changed into a prime (221431426066061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159384629 + ... + 160767915.

It is an arithmetic number, because the mean of its divisors is an integer number (10975072006536).

Almost surely, 2^{221431426066064} is an apocalyptic number.

It is an amenable number.

221431426066064 is a deficient number, since it is larger than the sum of its proper divisors (217571454195376).

221431426066064 is a wasteful number, since it uses less digits than its factorization.

221431426066064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616007 (or 1616001 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 47.

The spelling of 221431426066064 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, four hundred twenty-six million, sixty-six thousand, sixty-four".