77721262327 has 8 divisors (see below), whose sum is σ = 77959288512. Its totient is φ = 77483577600.

The previous prime is 77721262321. The next prime is 77721262361. The reversal of 77721262327 is 72326212777.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77721262327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77721262321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374338 + ... + 543664.

It is an arithmetic number, because the mean of its divisors is an integer number (9744911064).

Almost surely, 2^77721262327 is an apocalyptic number.

77721262327 is a deficient number, since it is larger than the sum of its proper divisors (238026185).

77721262327 is a wasteful number, since it uses less digits than its factorization.

77721262327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170729.

The product of its digits is 691488, while the sum is 46.

The spelling of 77721262327 in words is "seventy-seven billion, seven hundred twenty-one million, two hundred sixty-two thousand, three hundred twenty-seven".