80261688541 has 4 divisors (see below), whose sum is σ = 80270646300. Its totient is φ = 80252730784.

The previous prime is 80261688527. The next prime is 80261688553. The reversal of 80261688541 is 14588616208.

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 24532643641 + 55729044900 = 156629^2 + 236070^2 .

It is a cyclic number.

It is not a de Polignac number, because 80261688541 - 2⁵ = 80261688509 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 (80261682541) 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, 4465426 + ... + 4483363.

It is an arithmetic number, because the mean of its divisors is an integer number (20067661575).

Almost surely, 2^80261688541 is an apocalyptic number.

It is an amenable number.

80261688541 is a deficient number, since it is larger than the sum of its proper divisors (8957759).

80261688541 is an equidigital number, since it uses as much as digits as its factorization.

80261688541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8957758.

The product of its (nonzero) digits is 737280, while the sum is 49.

The spelling of 80261688541 in words is "eighty billion, two hundred sixty-one million, six hundred eighty-eight thousand, five hundred forty-one".