145817087645 has 6 divisors (see below), whose sum is σ = 174981529818. Its totient is φ = 116652987024.

The previous prime is 145817087639. The next prime is 145817087693. The reversal of 145817087645 is 546780718541.

145817087645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 10761572644 + 135055515001 = 103738^2 + 367499^2 .

It is not a de Polignac number, because 145817087645 - 2¹⁴ = 145817071261 is a prime.

It is a super-2 number, since 2×145817087645² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 768479 + ... + 939251.

It is an arithmetic number, because the mean of its divisors is an integer number (29163588303).

Almost surely, 2^145817087645 is an apocalyptic number.

It is an amenable number.

145817087645 is a deficient number, since it is larger than the sum of its proper divisors (29164442173).

145817087645 is an frugal number, since it uses more digits than its factorization.

145817087645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341551 (or 170778 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 56.

The spelling of 145817087645 in words is "one hundred forty-five billion, eight hundred seventeen million, eighty-seven thousand, six hundred forty-five".