80694349657 has 8 divisors (see below), whose sum is σ = 82214494920. Its totient is φ = 79188345600.

The previous prime is 80694349643. The next prime is 80694349691. The reversal of 80694349657 is 75694349608.

It can be written as a sum of positive squares in 4 ways, for example, as 2886268176 + 77808081481 = 53724^2 + 278941^2 .

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 80694349657 - 2¹⁵ = 80694316889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80694349595 and 80694349604.

It is not an unprimeable number, because it can be changed into a prime (80694349607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3523782 + ... + 3546607.

It is an arithmetic number, because the mean of its divisors is an integer number (10276811865).

Almost surely, 2^80694349657 is an apocalyptic number.

It is an amenable number.

80694349657 is a deficient number, since it is larger than the sum of its proper divisors (1520145263).

80694349657 is a wasteful number, since it uses less digits than its factorization.

80694349657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7070603.

The product of its (nonzero) digits is 39191040, while the sum is 61.

The spelling of 80694349657 in words is "eighty billion, six hundred ninety-four million, three hundred forty-nine thousand, six hundred fifty-seven".