80978859 has 40 divisors (see below), whose sum is σ = 132823152. Its totient is φ = 48859200.

The previous prime is 80978809. The next prime is 80978879. The reversal of 80978859 is 95887908.

It is not a de Polignac number, because 80978859 - 2¹¹ = 80976811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80978809) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 55084 + ... + 56534.

Almost surely, 2^80978859 is an apocalyptic number.

80978859 is a deficient number, since it is larger than the sum of its proper divisors (51844293).

80978859 is a wasteful number, since it uses less digits than its factorization.

80978859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529 (or 1520 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 54.

The square root of 80978859 is about 8998.8254233539. The cubic root of 80978859 is about 432.6372251030.

The spelling of 80978859 in words is "eighty million, nine hundred seventy-eight thousand, eight hundred fifty-nine".