164196593381 has 2 divisors, whose sum is σ = 164196593382. Its totient is φ = 164196593380.

The previous prime is 164196593339. The next prime is 164196593399. The reversal of 164196593381 is 183395691461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122926670881 + 41269922500 = 350609^2 + 203150^2 .

It is a cyclic number.

It is not a de Polignac number, because 164196593381 - 2⁶ = 164196593317 is a prime.

It is a super-2 number, since 2×164196593381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164196593581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82098296690 + 82098296691.

It is an arithmetic number, because the mean of its divisors is an integer number (82098296691).

Almost surely, 2^164196593381 is an apocalyptic number.

It is an amenable number.

164196593381 is a deficient number, since it is larger than the sum of its proper divisors (1).

164196593381 is an equidigital number, since it uses as much as digits as its factorization.

164196593381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4199040, while the sum is 56.

The spelling of 164196593381 in words is "one hundred sixty-four billion, one hundred ninety-six million, five hundred ninety-three thousand, three hundred eighty-one".