80891003641 has 6 divisors (see below), whose sum is σ = 94097698170. Its totient is φ = 69335145936.

The previous prime is 80891003639. The next prime is 80891003651. The reversal of 80891003641 is 14630019808.

It can be written as a sum of positive squares in only one way, i.e., 57917235600 + 22973768041 = 240660^2 + 151571^2 .

It is not a de Polignac number, because 80891003641 - 2¹ = 80891003639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 80891003594 and 80891003603.

It is not an unprimeable number, because it can be changed into a prime (80891003651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 825418356 + ... + 825418453.

It is an arithmetic number, because the mean of its divisors is an integer number (15682949695).

Almost surely, 2^80891003641 is an apocalyptic number.

It is an amenable number.

80891003641 is a deficient number, since it is larger than the sum of its proper divisors (13206694529).

80891003641 is a wasteful number, since it uses less digits than its factorization.

80891003641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650836823 (or 1650836816 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 80891003641 in words is "eighty billion, eight hundred ninety-one million, three thousand, six hundred forty-one".