80857621 has 8 divisors (see below), whose sum is σ = 87171840. Its totient is φ = 74556912.

The previous prime is 80857613. The next prime is 80857643. The reversal of 80857621 is 12675808.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80857621 - 2³ = 80857613 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 (80857921) 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, 11520 + ... + 17158.

It is an arithmetic number, because the mean of its divisors is an integer number (10896480).

Almost surely, 2^80857621 is an apocalyptic number.

It is an amenable number.

80857621 is a deficient number, since it is larger than the sum of its proper divisors (6314219).

80857621 is a wasteful number, since it uses less digits than its factorization.

80857621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6755.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 80857621 is about 8992.0865765405. The cubic root of 80857621 is about 432.4212087639.

The spelling of 80857621 in words is "eighty million, eight hundred fifty-seven thousand, six hundred twenty-one".