80961678 has 48 divisors (see below), whose sum is σ = 207398880. Its totient is φ = 22333248.

The previous prime is 80961659. The next prime is 80961721. The reversal of 80961678 is 87616908.

It is a happy number.

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 23 ways as a sum of consecutive naturals, for example, 7425 + ... + 14732.

It is an arithmetic number, because the mean of its divisors is an integer number (4320810).

Almost surely, 2^80961678 is an apocalyptic number.

80961678 is an abundant number, since it is smaller than the sum of its proper divisors (126437202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80961678 is a wasteful number, since it uses less digits than its factorization.

80961678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22201 (or 22198 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 80961678 is about 8997.8707481270. The cubic root of 80961678 is about 432.6066258989.

The spelling of 80961678 in words is "eighty million, nine hundred sixty-one thousand, six hundred seventy-eight".