80961826 has 24 divisors (see below), whose sum is σ = 134901900. Its totient is φ = 36410880.

The previous prime is 80961761. The next prime is 80961833. The reversal of 80961826 is 62816908.

It can be written as a sum of positive squares in 2 ways, for example, as 69705801 + 11256025 = 8349^2 + 3355^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21750 + ... + 25198.

Almost surely, 2^80961826 is an apocalyptic number.

80961826 is a deficient number, since it is larger than the sum of its proper divisors (53940074).

80961826 is a wasteful number, since it uses less digits than its factorization.

80961826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3570 (or 3559 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 80961826 is about 8997.8789722912. The cubic root of 80961826 is about 432.6068895040.

The spelling of 80961826 in words is "eighty million, nine hundred sixty-one thousand, eight hundred twenty-six".