73836649441 has 3 divisors (see below), whose sum is σ = 73836921171. Its totient is φ = 73836377712.

The previous prime is 73836649433. The next prime is 73836649451. The reversal of 73836649441 is 14494663837.

The square root of 73836649441 is 271729.

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

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.

It can be written as a sum of positive squares in only one way, i.e., 156975841 + 73679673600 = 12529^2 + 271440^2 .

It is not a de Polignac number, because 73836649441 - 2³ = 73836649433 is a prime.

It is a super-2 number, since 2×73836649441² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73836649451) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 135865 + ... + 407593.

It is an arithmetic number, because the mean of its divisors is an integer number (24612307057).

Almost surely, 2^73836649441 is an apocalyptic number.

73836649441 is the 271729-th square number.

73836649441 is the 135865-th centered octagonal number.

It is an amenable number.

73836649441 is a deficient number, since it is larger than the sum of its proper divisors (271730).

73836649441 is an frugal number, since it uses more digits than its factorization.

73836649441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543458 (or 271729 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 55.

The spelling of 73836649441 in words is "seventy-three billion, eight hundred thirty-six million, six hundred forty-nine thousand, four hundred forty-one".