80621045 has 8 divisors (see below), whose sum is σ = 96813240. Its totient is φ = 64451520.

The previous prime is 80621017. The next prime is 80621059. The reversal of 80621045 is 54012608.

It can be written as a sum of positive squares in 4 ways, for example, as 178084 + 80442961 = 422^2 + 8969^2 .

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

It is not a de Polignac number, because 80621045 - 2⁸ = 80620789 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3515 + ... + 13175.

It is an arithmetic number, because the mean of its divisors is an integer number (12101655).

Almost surely, 2^80621045 is an apocalyptic number.

It is an amenable number.

80621045 is a deficient number, since it is larger than the sum of its proper divisors (16192195).

80621045 is a wasteful number, since it uses less digits than its factorization.

80621045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11335.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 80621045 is about 8978.9222627217. The cubic root of 80621045 is about 431.9990658559. Note that the first 3 decimals are identical.

The spelling of 80621045 in words is "eighty million, six hundred twenty-one thousand, forty-five".