45236610721 has 9 divisors (see below), whose sum is σ = 46117727929. Its totient is φ = 44372029936.

The previous prime is 45236610719. The next prime is 45236610733. The reversal of 45236610721 is 12701663254.

The square root of 45236610721 is 212689.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 14457417121 + 30779193600 = 120239^2 + 175440^2 .

It is not a de Polignac number, because 45236610721 - 2¹ = 45236610719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45236610121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11270511 + ... + 11274523.

Almost surely, 2^45236610721 is an apocalyptic number.

45236610721 is the 212689-th square number.

45236610721 is the 106345-th centered octagonal number.

It is an amenable number.

45236610721 is a deficient number, since it is larger than the sum of its proper divisors (881117208).

45236610721 is an frugal number, since it uses more digits than its factorization.

45236610721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8132 (or 4066 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The spelling of 45236610721 in words is "forty-five billion, two hundred thirty-six million, six hundred ten thousand, seven hundred twenty-one".