80631009923 has 2 divisors, whose sum is σ = 80631009924. Its totient is φ = 80631009922.

The previous prime is 80631009919. The next prime is 80631009961. The reversal of 80631009923 is 32990013608.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80631009923 - 2² = 80631009919 is a prime.

It is a super-2 number, since 2×80631009923² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (80631009913) 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 as a sum of consecutive naturals, namely, 40315504961 + 40315504962.

It is an arithmetic number, because the mean of its divisors is an integer number (40315504962).

Almost surely, 2^80631009923 is an apocalyptic number.

80631009923 is a deficient number, since it is larger than the sum of its proper divisors (1).

80631009923 is an equidigital number, since it uses as much as digits as its factorization.

80631009923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 41.

The spelling of 80631009923 in words is "eighty billion, six hundred thirty-one million, nine thousand, nine hundred twenty-three".