80809641 has 24 divisors (see below), whose sum is σ = 134041440. Its totient is φ = 46396800.

The previous prime is 80809639. The next prime is 80809661. The reversal of 80809641 is 14690808.

It is a happy number.

80809641 is a `hidden beast` number, since 8 + 0 + 8 + 0 + 9 + 641 = 666.

It is not a de Polignac number, because 80809641 - 2¹ = 80809639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 80809596 and 80809605.

It is not an unprimeable number, because it can be changed into a prime (80809661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19600 + ... + 23361.

It is an arithmetic number, because the mean of its divisors is an integer number (5585060).

Almost surely, 2^80809641 is an apocalyptic number.

It is an amenable number.

80809641 is a deficient number, since it is larger than the sum of its proper divisors (53231799).

80809641 is a wasteful number, since it uses less digits than its factorization.

80809641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42997 (or 42994 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 80809641 is about 8989.4182792882. The cubic root of 80809641 is about 432.3356605518.

The spelling of 80809641 in words is "eighty million, eight hundred nine thousand, six hundred forty-one".