80954491393 has 4 divisors (see below), whose sum is σ = 80961961428. Its totient is φ = 80947021360.

The previous prime is 80954491379. The next prime is 80954491439. The reversal of 80954491393 is 39319445908.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31505185009 + 49449306384 = 177497^2 + 222372^2 .

It is a cyclic number.

It is not a de Polignac number, because 80954491393 - 2¹³ = 80954483201 is a prime.

It is a super-2 number, since 2×80954491393² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80954492393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3718738 + ... + 3740443.

It is an arithmetic number, because the mean of its divisors is an integer number (20240490357).

Almost surely, 2^80954491393 is an apocalyptic number.

It is an amenable number.

80954491393 is a deficient number, since it is larger than the sum of its proper divisors (7470035).

80954491393 is a wasteful number, since it uses less digits than its factorization.

80954491393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7470034.

The product of its (nonzero) digits is 4199040, while the sum is 55.

The spelling of 80954491393 in words is "eighty billion, nine hundred fifty-four million, four hundred ninety-one thousand, three hundred ninety-three".