80919070981 has 8 divisors (see below), whose sum is σ = 92484751424. Its totient is φ = 69354843840.

The previous prime is 80919070963. The next prime is 80919071027. The reversal of 80919070981 is 18907091908.

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 80919070981 - 2⁹ = 80919070469 is a prime.

It is a super-2 number, since 2×80919070981² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80919070681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241275 + ... + 469096.

It is an arithmetic number, because the mean of its divisors is an integer number (11560593928).

Almost surely, 2^80919070981 is an apocalyptic number.

It is an amenable number.

80919070981 is a deficient number, since it is larger than the sum of its proper divisors (11565680443).

80919070981 is a wasteful number, since it uses less digits than its factorization.

80919070981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726651.

The product of its (nonzero) digits is 326592, while the sum is 52.

The spelling of 80919070981 in words is "eighty billion, nine hundred nineteen million, seventy thousand, nine hundred eighty-one".