80815963 has 16 divisors (see below), whose sum is σ = 85003776. Its totient is φ = 76769280.

The previous prime is 80815921. The next prime is 80815981. The reversal of 80815963 is 36951808.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80815963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80815913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314331 + ... + 314587.

It is an arithmetic number, because the mean of its divisors is an integer number (5312736).

Almost surely, 2^80815963 is an apocalyptic number.

80815963 is a deficient number, since it is larger than the sum of its proper divisors (4187813).

80815963 is a wasteful number, since it uses less digits than its factorization.

80815963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 80815963 is about 8989.7699080677. The cubic root of 80815963 is about 432.3469345975.

The spelling of 80815963 in words is "eighty million, eight hundred fifteen thousand, nine hundred sixty-three".