80621855 has 16 divisors (see below), whose sum is σ = 100533504. Its totient is φ = 62000640.

The previous prime is 80621843. The next prime is 80621869. The reversal of 80621855 is 55812608.

It is a happy number.

It is not a de Polignac number, because 80621855 - 2⁴ = 80621839 is a prime.

It is a Duffinian number.

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, 22679 + ... + 25991.

It is an arithmetic number, because the mean of its divisors is an integer number (6283344).

Almost surely, 2^80621855 is an apocalyptic number.

80621855 is a deficient number, since it is larger than the sum of its proper divisors (19911649).

80621855 is a wasteful number, since it uses less digits than its factorization.

80621855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3506.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 80621855 is about 8978.9673682445. The cubic root of 80621855 is about 432.0005126166. Note that the first 3 decimals are identical.

The spelling of 80621855 in words is "eighty million, six hundred twenty-one thousand, eight hundred fifty-five".