80631009937 has 4 divisors (see below), whose sum is σ = 83411389620. Its totient is φ = 77850630256.

The previous prime is 80631009923. The next prime is 80631009961. The reversal of 80631009937 is 73990013608.

It is a Cunningham number, because it is equal to 283956²+1.

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 42281229376 + 38349780561 = 205624^2 + 195831^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80631009937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80631009337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1390189798 + ... + 1390189855.

It is an arithmetic number, because the mean of its divisors is an integer number (20852847405).

Almost surely, 2^80631009937 is an apocalyptic number.

It is an amenable number.

80631009937 is a deficient number, since it is larger than the sum of its proper divisors (2780379683).

80631009937 is a wasteful number, since it uses less digits than its factorization.

80631009937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2780379682.

The product of its (nonzero) digits is 244944, while the sum is 46.

The spelling of 80631009937 in words is "eighty billion, six hundred thirty-one million, nine thousand, nine hundred thirty-seven".