80956786 has 4 divisors (see below), whose sum is σ = 121435182. Its totient is φ = 40478392.

The previous prime is 80956783. The next prime is 80956829. The reversal of 80956786 is 68765908.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 78943225 + 2013561 = 8885^2 + 1419^2 .

It is not an unprimeable number, because it can be changed into a prime (80956783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20239195 + ... + 20239198.

Almost surely, 2^80956786 is an apocalyptic number.

80956786 is a deficient number, since it is larger than the sum of its proper divisors (40478396).

80956786 is a wasteful number, since it uses less digits than its factorization.

80956786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40478395.

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 80956786 is about 8997.5989019293. The cubic root of 80956786 is about 432.5979124998.

The spelling of 80956786 in words is "eighty million, nine hundred fifty-six thousand, seven hundred eighty-six".