77243627647271 has 4 divisors (see below), whose sum is σ = 77281697451000. Its totient is φ = 77205557843544.

The previous prime is 77243627647231. The next prime is 77243627647301. The reversal of 77243627647271 is 17274672634277.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77243627647271 is a prime.

It is a super-2 number, since 2×77243627647271² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77243627647198 and 77243627647207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77243627647201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19034898821 + ... + 19034902878.

It is an arithmetic number, because the mean of its divisors is an integer number (19320424362750).

Almost surely, 2^{77243627647271} is an apocalyptic number.

77243627647271 is a deficient number, since it is larger than the sum of its proper divisors (38069803729).

77243627647271 is a wasteful number, since it uses less digits than its factorization.

77243627647271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38069803728.

The product of its digits is 232339968, while the sum is 65.

The spelling of 77243627647271 in words is "seventy-seven trillion, two hundred forty-three billion, six hundred twenty-seven million, six hundred forty-seven thousand, two hundred seventy-one".