80685942929 has 4 divisors (see below), whose sum is σ = 85432174884. Its totient is φ = 75939710976.

The previous prime is 80685942923. The next prime is 80685942959. The reversal of 80685942929 is 92924958608.

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 72046612225 + 8639330704 = 268415^2 + 92948^2 .

It is a cyclic number.

It is not a de Polignac number, because 80685942929 - 2¹² = 80685938833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80685942923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2373115952 + ... + 2373115985.

It is an arithmetic number, because the mean of its divisors is an integer number (21358043721).

Almost surely, 2^80685942929 is an apocalyptic number.

It is an amenable number.

80685942929 is a deficient number, since it is larger than the sum of its proper divisors (4746231955).

80685942929 is a wasteful number, since it uses less digits than its factorization.

80685942929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4746231954.

The product of its (nonzero) digits is 22394880, while the sum is 62.

The spelling of 80685942929 in words is "eighty billion, six hundred eighty-five million, nine hundred forty-two thousand, nine hundred twenty-nine".