80642544 has 80 divisors (see below), whose sum is σ = 216057600. Its totient is φ = 25901568.

The previous prime is 80642539. The next prime is 80642567. The reversal of 80642544 is 44524608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183477 + ... + 183915.

It is an arithmetic number, because the mean of its divisors is an integer number (2700720).

Almost surely, 2^80642544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80642544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108028800).

80642544 is an abundant number, since it is smaller than the sum of its proper divisors (135415056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80642544 is a wasteful number, since it uses less digits than its factorization.

80642544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582 (or 576 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 33.

The square root of 80642544 is about 8980.1193755985. The cubic root of 80642544 is about 432.0374624577.

The spelling of 80642544 in words is "eighty million, six hundred forty-two thousand, five hundred forty-four".