164271456230021 has 32 divisors (see below), whose sum is σ = 196738609536000. Its totient is φ = 134181740189952.

The previous prime is 164271456229987. The next prime is 164271456230113. The reversal of 164271456230021 is 120032654172461.

It is a de Polignac number, because none of the positive numbers 2^k-164271456230021 is a prime.

It is a super-2 number, since 2×164271456230021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164271456230621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44891015 + ... + 48412251.

It is an arithmetic number, because the mean of its divisors is an integer number (6148081548000).

Almost surely, 2^{164271456230021} is an apocalyptic number.

It is an amenable number.

164271456230021 is a deficient number, since it is larger than the sum of its proper divisors (32467153305979).

164271456230021 is a wasteful number, since it uses less digits than its factorization.

164271456230021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3524261.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 164271456230021 in words is "one hundred sixty-four trillion, two hundred seventy-one billion, four hundred fifty-six million, two hundred thirty thousand, twenty-one".