164697473281 has 16 divisors (see below), whose sum is σ = 184548688128. Its totient is φ = 145713229200.

The previous prime is 164697473279. The next prime is 164697473323. The reversal of 164697473281 is 182374796461.

It is a happy number.

It is not a de Polignac number, because 164697473281 - 2¹ = 164697473279 is a prime.

It is a super-2 number, since 2×164697473281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164697473201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1285035 + ... + 1407376.

It is an arithmetic number, because the mean of its divisors is an integer number (11534293008).

Almost surely, 2^164697473281 is an apocalyptic number.

164697473281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

164697473281 is a deficient number, since it is larger than the sum of its proper divisors (19851214847).

164697473281 is a wasteful number, since it uses less digits than its factorization.

164697473281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2692572.

The product of its digits is 12192768, while the sum is 58.

The spelling of 164697473281 in words is "one hundred sixty-four billion, six hundred ninety-seven million, four hundred seventy-three thousand, two hundred eighty-one".