80621016 has 64 divisors (see below), whose sum is σ = 234151680. Its totient is φ = 22654080.

The previous prime is 80621011. The next prime is 80621017. The reversal of 80621016 is 61012608.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80621011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6315 + ... + 14181.

It is an arithmetic number, because the mean of its divisors is an integer number (3658620).

Almost surely, 2^80621016 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 80621016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117075840).

80621016 is an abundant number, since it is smaller than the sum of its proper divisors (153530664).

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

80621016 is a wasteful number, since it uses less digits than its factorization.

80621016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7944 (or 7940 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 80621016 is about 8978.9206478284. The cubic root of 80621016 is about 431.9990140581. Note that the first 3 decimals are identical.

The spelling of 80621016 in words is "eighty million, six hundred twenty-one thousand, sixteen".