145390273805 has 12 divisors (see below), whose sum is σ = 202952953980. Its totient is φ = 99696187584.

The previous prime is 145390273801. The next prime is 145390273813. The reversal of 145390273805 is 508372093541.

It can be written as a sum of positive squares in 2 ways, for example, as 80142212836 + 65248060969 = 283094^2 + 255437^2 .

It is not a de Polignac number, because 145390273805 - 2² = 145390273801 is a prime.

It is a super-2 number, since 2×145390273805² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 145390273805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145390273801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 296714600 + ... + 296715089.

It is an arithmetic number, because the mean of its divisors is an integer number (16912746165).

Almost surely, 2^145390273805 is an apocalyptic number.

It is an amenable number.

145390273805 is a deficient number, since it is larger than the sum of its proper divisors (57562680175).

145390273805 is an equidigital number, since it uses as much as digits as its factorization.

145390273805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593429708 (or 593429701 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 145390273805 in words is "one hundred forty-five billion, three hundred ninety million, two hundred seventy-three thousand, eight hundred five".