145636363261 has 4 divisors (see below), whose sum is σ = 149188469724. Its totient is φ = 142084256800.

The previous prime is 145636363247. The next prime is 145636363273. The reversal of 145636363261 is 162363636541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162363636541 = 37 ⋅4388206393.

It can be written as a sum of positive squares in 2 ways, for example, as 51651198361 + 93985164900 = 227269^2 + 306570^2 .

It is a cyclic number.

It is not a de Polignac number, because 145636363261 - 2⁷ = 145636363133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145636363361) 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, 1776053170 + ... + 1776053251.

It is an arithmetic number, because the mean of its divisors is an integer number (37297117431).

Almost surely, 2^145636363261 is an apocalyptic number.

It is an amenable number.

145636363261 is a deficient number, since it is larger than the sum of its proper divisors (3552106463).

145636363261 is an equidigital number, since it uses as much as digits as its factorization.

145636363261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3552106462.

The product of its digits is 1399680, while the sum is 46.

It can be divided in two parts, 145636363 and 261, that added together give a square (145636624 = 12068²).

The spelling of 145636363261 in words is "one hundred forty-five billion, six hundred thirty-six million, three hundred sixty-three thousand, two hundred sixty-one".