145645229591 has 4 divisors (see below), whose sum is σ = 145717013400. Its totient is φ = 145573445784.

The previous prime is 145645229551. The next prime is 145645229617. The reversal of 145645229591 is 195922546541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 195922546541 = 288389 ⋅679369.

It is a cyclic number.

It is not a de Polignac number, because 145645229591 - 2¹⁰ = 145645228567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145645229551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35888861 + ... + 35892918.

It is an arithmetic number, because the mean of its divisors is an integer number (36429253350).

Almost surely, 2^145645229591 is an apocalyptic number.

145645229591 is a deficient number, since it is larger than the sum of its proper divisors (71783809).

145645229591 is an equidigital number, since it uses as much as digits as its factorization.

145645229591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71783808.

The product of its digits is 3888000, while the sum is 53.

The spelling of 145645229591 in words is "one hundred forty-five billion, six hundred forty-five million, two hundred twenty-nine thousand, five hundred ninety-one".