77297688872671 has 4 divisors (see below), whose sum is σ = 81844611747552. Its totient is φ = 72750765997792.

The previous prime is 77297688872641. The next prime is 77297688872687. The reversal of 77297688872671 is 17627888679277.

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-77297688872671 is a prime.

It is a super-2 number, since 2×77297688872671² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77297688872641) 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, 2273461437415 + ... + 2273461437448.

It is an arithmetic number, because the mean of its divisors is an integer number (20461152936888).

Almost surely, 2^{77297688872671} is an apocalyptic number.

77297688872671 is a deficient number, since it is larger than the sum of its proper divisors (4546922874881).

77297688872671 is a wasteful number, since it uses less digits than its factorization.

77297688872671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4546922874880.

The product of its digits is 11152318464, while the sum is 85.

The spelling of 77297688872671 in words is "seventy-seven trillion, two hundred ninety-seven billion, six hundred eighty-eight million, eight hundred seventy-two thousand, six hundred seventy-one".