27773532461 has 4 divisors (see below), whose sum is σ = 27776622972. Its totient is φ = 27770441952.

The previous prime is 27773532427. The next prime is 27773532463. The reversal of 27773532461 is 16423537772.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15507969961 + 12265562500 = 124531^2 + 110750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27773532461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27773532463) 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, 1531736 + ... + 1549761.

It is an arithmetic number, because the mean of its divisors is an integer number (6944155743).

Almost surely, 2^27773532461 is an apocalyptic number.

It is an amenable number.

27773532461 is a deficient number, since it is larger than the sum of its proper divisors (3090511).

27773532461 is an equidigital number, since it uses as much as digits as its factorization.

27773532461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3090510.

The product of its digits is 1481760, while the sum is 47.

The spelling of 27773532461 in words is "twenty-seven billion, seven hundred seventy-three million, five hundred thirty-two thousand, four hundred sixty-one".