77681471471 has 2 divisors, whose sum is σ = 77681471472. Its totient is φ = 77681471470.

The previous prime is 77681471467. The next prime is 77681471477. The reversal of 77681471471 is 17417418677.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77681471471 - 2² = 77681471467 is a prime.

It is a super-3 number, since 3×77681471471³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77681471477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38840735735 + 38840735736.

It is an arithmetic number, because the mean of its divisors is an integer number (38840735736).

Almost surely, 2^77681471471 is an apocalyptic number.

77681471471 is a deficient number, since it is larger than the sum of its proper divisors (1).

77681471471 is an equidigital number, since it uses as much as digits as its factorization.

77681471471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1843968, while the sum is 53.

The spelling of 77681471471 in words is "seventy-seven billion, six hundred eighty-one million, four hundred seventy-one thousand, four hundred seventy-one".