145634791889 has 2 divisors, whose sum is σ = 145634791890. Its totient is φ = 145634791888.

The previous prime is 145634791873. The next prime is 145634791919. The reversal of 145634791889 is 988197436541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102597214864 + 43037577025 = 320308^2 + 207455^2 .

It is a cyclic number.

It is not a de Polignac number, because 145634791889 - 2⁴ = 145634791873 is a prime.

It is not a weakly prime, because it can be changed into another prime (145634731889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72817395944 + 72817395945.

It is an arithmetic number, because the mean of its divisors is an integer number (72817395945).

Almost surely, 2^145634791889 is an apocalyptic number.

It is an amenable number.

145634791889 is a deficient number, since it is larger than the sum of its proper divisors (1).

145634791889 is an equidigital number, since it uses as much as digits as its factorization.

145634791889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52254720, while the sum is 65.

The spelling of 145634791889 in words is "one hundred forty-five billion, six hundred thirty-four million, seven hundred ninety-one thousand, eight hundred eighty-nine".