164514970681 has 2 divisors, whose sum is σ = 164514970682. Its totient is φ = 164514970680.

The previous prime is 164514970679. The next prime is 164514970691. The reversal of 164514970681 is 186079415461.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161117946025 + 3397024656 = 401395^2 + 58284^2 .

It is a cyclic number.

It is not a de Polignac number, because 164514970681 - 2¹ = 164514970679 is a prime.

It is a super-2 number, since 2×164514970681² (a number of 23 digits) contains 22 as substring.

Together with 164514970679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (164514970661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82257485340 + 82257485341.

It is an arithmetic number, because the mean of its divisors is an integer number (82257485341).

Almost surely, 2^164514970681 is an apocalyptic number.

It is an amenable number.

164514970681 is a deficient number, since it is larger than the sum of its proper divisors (1).

164514970681 is an equidigital number, since it uses as much as digits as its factorization.

164514970681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 164514970681 in words is "one hundred sixty-four billion, five hundred fourteen million, nine hundred seventy thousand, six hundred eighty-one".