80958081981 has 16 divisors (see below), whose sum is σ = 123460295168. Its totient is φ = 46225911600.

The previous prime is 80958081959. The next prime is 80958082003. The reversal of 80958081981 is 18918085908.

It is an interprime number because it is at equal distance from previous prime (80958081959) and next prime (80958082003).

It is not a de Polignac number, because 80958081981 - 2¹³ = 80958073789 is a prime.

It is a super-2 number, since 2×80958081981² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80958081181) 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, 1465975 + ... + 1520196.

It is an arithmetic number, because the mean of its divisors is an integer number (7716268448).

Almost surely, 2^80958081981 is an apocalyptic number.

It is an amenable number.

80958081981 is a deficient number, since it is larger than the sum of its proper divisors (42502213187).

80958081981 is a wasteful number, since it uses less digits than its factorization.

80958081981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2987472.

The product of its (nonzero) digits is 1658880, while the sum is 57.

The spelling of 80958081981 in words is "eighty billion, nine hundred fifty-eight million, eighty-one thousand, nine hundred eighty-one".