80946505 has 8 divisors (see below), whose sum is σ = 99505224. Its totient is φ = 63177600.

The previous prime is 80946473. The next prime is 80946521. The reversal of 80946505 is 50564908.

It can be written as a sum of positive squares in 4 ways, for example, as 808201 + 80138304 = 899^2 + 8952^2 .

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

It is not a de Polignac number, because 80946505 - 2⁵ = 80946473 is a prime.

It is a Duffinian 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, 197226 + ... + 197635.

It is an arithmetic number, because the mean of its divisors is an integer number (12438153).

Almost surely, 2^80946505 is an apocalyptic number.

It is an amenable number.

80946505 is a deficient number, since it is larger than the sum of its proper divisors (18558719).

80946505 is a wasteful number, since it uses less digits than its factorization.

80946505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394907.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 80946505 is about 8997.0275647016. The cubic root of 80946505 is about 432.5795993246.

The spelling of 80946505 in words is "eighty million, nine hundred forty-six thousand, five hundred five".