80644038543 has 12 divisors (see below), whose sum is σ = 116498681728. Its totient is φ = 53756762400.

The previous prime is 80644038523. The next prime is 80644038571. The reversal of 80644038543 is 34583044608.

80644038543 is a `hidden beast` number, since 8 + 0 + 64 + 40 + 3 + 8 + 543 = 666.

It is not a de Polignac number, because 80644038543 - 2⁵ = 80644038511 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 (80644038523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 407230 + ... + 571947.

Almost surely, 2^80644038543 is an apocalyptic number.

80644038543 is a deficient number, since it is larger than the sum of its proper divisors (35854643185).

80644038543 is a wasteful number, since it uses less digits than its factorization.

80644038543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988334 (or 988331 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 45.

The spelling of 80644038543 in words is "eighty billion, six hundred forty-four million, thirty-eight thousand, five hundred forty-three".