145691064817 has 2 divisors, whose sum is σ = 145691064818. Its totient is φ = 145691064816.

The previous prime is 145691064793. The next prime is 145691064833. The reversal of 145691064817 is 718460196541.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81439461376 + 64251603441 = 285376^2 + 253479^2 .

It is a cyclic number.

It is not a de Polignac number, because 145691064817 - 2¹⁹ = 145690540529 is a prime.

It is a super-2 number, since 2×145691064817² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145691064017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72845532408 + 72845532409.

It is an arithmetic number, because the mean of its divisors is an integer number (72845532409).

Almost surely, 2^145691064817 is an apocalyptic number.

It is an amenable number.

145691064817 is a deficient number, since it is larger than the sum of its proper divisors (1).

145691064817 is an equidigital number, since it uses as much as digits as its factorization.

145691064817 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 145691064817 in words is "one hundred forty-five billion, six hundred ninety-one million, sixty-four thousand, eight hundred seventeen".