80431323461 has 4 divisors (see below), whose sum is σ = 82605143052. Its totient is φ = 78257503872.

The previous prime is 80431323439. The next prime is 80431323481. The reversal of 80431323461 is 16432313408.

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 37289541025 + 43141782436 = 193105^2 + 207706^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80431323461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80431323481) 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, 1086909740 + ... + 1086909813.

It is an arithmetic number, because the mean of its divisors is an integer number (20651285763).

Almost surely, 2^80431323461 is an apocalyptic number.

It is an amenable number.

80431323461 is a deficient number, since it is larger than the sum of its proper divisors (2173819591).

80431323461 is a wasteful number, since it uses less digits than its factorization.

80431323461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2173819590.

The product of its (nonzero) digits is 41472, while the sum is 35.

Adding to 80431323461 its reverse (16432313408), we get a palindrome (96863636869).

The spelling of 80431323461 in words is "eighty billion, four hundred thirty-one million, three hundred twenty-three thousand, four hundred sixty-one".