164226861 has 24 divisors (see below), whose sum is σ = 250211520. Its totient is φ = 103510656.

The previous prime is 164226841. The next prime is 164226863. The reversal of 164226861 is 168622461.

164226861 is a `hidden beast` number, since 1 + 642 + 2 + 6 + 8 + 6 + 1 = 666.

It is not a de Polignac number, because 164226861 - 2²² = 160032557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164226863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 166576 + ... + 167558.

It is an arithmetic number, because the mean of its divisors is an integer number (10425480).

Almost surely, 2^164226861 is an apocalyptic number.

It is an amenable number.

164226861 is a deficient number, since it is larger than the sum of its proper divisors (85984659).

164226861 is a wasteful number, since it uses less digits than its factorization.

164226861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1985 (or 1982 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 164226861 is about 12815.1028478120. The cubic root of 164226861 is about 547.6226434452.

The spelling of 164226861 in words is "one hundred sixty-four million, two hundred twenty-six thousand, eight hundred sixty-one".