164861263 has 18 divisors (see below), whose sum is σ = 197898792. Its totient is φ = 134525160.

The previous prime is 164861261. The next prime is 164861267. The reversal of 164861263 is 362168461.

It is a happy number.

It is not a de Polignac number, because 164861263 - 2¹ = 164861261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164861261) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 781228 + ... + 781438.

Almost surely, 2^164861263 is an apocalyptic number.

164861263 is a deficient number, since it is larger than the sum of its proper divisors (33037529).

164861263 is an frugal number, since it uses more digits than its factorization.

164861263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475 (or 241 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 164861263 is about 12839.8311125965. The cubic root of 164861263 is about 548.3268857520.

The spelling of 164861263 in words is "one hundred sixty-four million, eight hundred sixty-one thousand, two hundred sixty-three".