145989953539 has 4 divisors (see below), whose sum is σ = 145990897056. Its totient is φ = 145989010024.

The previous prime is 145989953477. The next prime is 145989953569. The reversal of 145989953539 is 935359989541.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 935359989541 = 103 ⋅9081164947.

It is a cyclic number.

It is not a de Polignac number, because 145989953539 - 2⁹ = 145989953027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145989953569) 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, 179179 + ... + 569284.

It is an arithmetic number, because the mean of its divisors is an integer number (36497724264).

Almost surely, 2^145989953539 is an apocalyptic number.

145989953539 is a deficient number, since it is larger than the sum of its proper divisors (943517).

145989953539 is an equidigital number, since it uses as much as digits as its factorization.

145989953539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943516.

The product of its digits is 236196000, while the sum is 70.

The spelling of 145989953539 in words is "one hundred forty-five billion, nine hundred eighty-nine million, nine hundred fifty-three thousand, five hundred thirty-nine".