80891929741491 has 48 divisors (see below), whose sum is σ = 139473364615200. Its totient is φ = 46141564170240.

The previous prime is 80891929741463. The next prime is 80891929741507. The reversal of 80891929741491 is 19414792919808.

80891929741491 is a `hidden beast` number, since 8 + 0 + 8 + 9 + 1 + 9 + 2 + 97 + 41 + 491 = 666.

It is not a de Polignac number, because 80891929741491 - 2²⁵ = 80891896187059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80891929741421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 728188846 + ... + 728299923.

It is an arithmetic number, because the mean of its divisors is an integer number (2905695096150).

Almost surely, 2^{80891929741491} is an apocalyptic number.

80891929741491 is a deficient number, since it is larger than the sum of its proper divisors (58581434873709).

80891929741491 is a wasteful number, since it uses less digits than its factorization.

80891929741491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456488817 (or 1456488800 counting only the distinct ones).

The product of its (nonzero) digits is 94058496, while the sum is 72.

The spelling of 80891929741491 in words is "eighty trillion, eight hundred ninety-one billion, nine hundred twenty-nine million, seven hundred forty-one thousand, four hundred ninety-one".