80878240881 has 27 divisors (see below), whose sum is σ = 121345759353. Its totient is φ = 53903470140.

The previous prime is 80878240873. The next prime is 80878240909. The reversal of 80878240881 is 18804287808.

The square root of 80878240881 is 284391.

It is a perfect power (a square), and thus also a powerful number.

80878240881 is a `hidden beast` number, since 8 + 0 + 87 + 82 + 408 + 81 = 666.

It is a tau number, because it is divible by the number of its divisors (27).

It is not a de Polignac number, because 80878240881 - 2³ = 80878240873 is a prime.

It is a super-2 number, since 2×80878240881² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80878240981) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 23033916 + ... + 23037426.

Almost surely, 2^80878240881 is an apocalyptic number.

80878240881 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

80878240881 is the 284391-st square number.

80878240881 is the 142196-th centered octagonal number.

It is an amenable number.

80878240881 is a deficient number, since it is larger than the sum of its proper divisors (40467518472).

80878240881 is an frugal number, since it uses more digits than its factorization.

80878240881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7046 (or 3514 counting only the distinct ones).

The product of its (nonzero) digits is 1835008, while the sum is 54.

The spelling of 80878240881 in words is "eighty billion, eight hundred seventy-eight million, two hundred forty thousand, eight hundred eighty-one".