80915906 has 8 divisors (see below), whose sum is σ = 122075964. Its totient is φ = 40223920.

The previous prime is 80915897. The next prime is 80915911. The reversal of 80915906 is 60951908.

It can be written as a sum of positive squares in 2 ways, for example, as 60295225 + 20620681 = 7765^2 + 4541^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 80915906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116585 + ... + 117276.

Almost surely, 2^80915906 is an apocalyptic number.

80915906 is a deficient number, since it is larger than the sum of its proper divisors (41160058).

80915906 is a wasteful number, since it uses less digits than its factorization.

80915906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234036.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 80915906 is about 8995.3268978954. The cubic root of 80915906 is about 432.5250852502.

The spelling of 80915906 in words is "eighty million, nine hundred fifteen thousand, nine hundred six".