80689642 has 16 divisors (see below), whose sum is σ = 132178752. Its totient is φ = 36637920.

The previous prime is 80689627. The next prime is 80689643. The reversal of 80689642 is 24698608.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (80689643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32758 + ... + 35134.

It is an arithmetic number, because the mean of its divisors is an integer number (8261172).

Almost surely, 2^80689642 is an apocalyptic number.

80689642 is a deficient number, since it is larger than the sum of its proper divisors (51489110).

80689642 is a wasteful number, since it uses less digits than its factorization.

80689642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3933.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 80689642 is about 8982.7413410384. The cubic root of 80689642 is about 432.1215543003.

The spelling of 80689642 in words is "eighty million, six hundred eighty-nine thousand, six hundred forty-two".