80978855 has 8 divisors (see below), whose sum is σ = 102289200. Its totient is φ = 61373376.

The previous prime is 80978809. The next prime is 80978879. The reversal of 80978855 is 55887908.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80978855 - 2¹⁴ = 80962471 is a prime.

It is a super-2 number, since 2×80978855² = 13115149914222050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426110 + ... + 426299.

It is an arithmetic number, because the mean of its divisors is an integer number (12786150).

Almost surely, 2^80978855 is an apocalyptic number.

80978855 is a deficient number, since it is larger than the sum of its proper divisors (21310345).

80978855 is a wasteful number, since it uses less digits than its factorization.

80978855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852433.

The product of its (nonzero) digits is 806400, while the sum is 50.

The square root of 80978855 is about 8998.8252011026. The cubic root of 80978855 is about 432.6372179796.

The spelling of 80978855 in words is "eighty million, nine hundred seventy-eight thousand, eight hundred fifty-five".