80642154673 has 2 divisors, whose sum is σ = 80642154674. Its totient is φ = 80642154672.

The previous prime is 80642154653. The next prime is 80642154701. The reversal of 80642154673 is 37645124608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79092000289 + 1550154384 = 281233^2 + 39372^2 .

It is a cyclic number.

It is not a de Polignac number, because 80642154673 - 2²¹ = 80640057521 is a prime.

It is a super-2 number, since 2×80642154673² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80642154653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40321077336 + 40321077337.

It is an arithmetic number, because the mean of its divisors is an integer number (40321077337).

Almost surely, 2^80642154673 is an apocalyptic number.

It is an amenable number.

80642154673 is a deficient number, since it is larger than the sum of its proper divisors (1).

80642154673 is an equidigital number, since it uses as much as digits as its factorization.

80642154673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 46.

The spelling of 80642154673 in words is "eighty billion, six hundred forty-two million, one hundred fifty-four thousand, six hundred seventy-three".