77121123216527 has 8 divisors (see below), whose sum is σ = 83986702899120. Its totient is φ = 70388855760960.

The previous prime is 77121123216523. The next prime is 77121123216559. The reversal of 77121123216527 is 72561232112177.

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

It is a cyclic number.

It is not a de Polignac number, because 77121123216527 - 2² = 77121123216523 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 (77121123216523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33328055549 + ... + 33328057862.

It is an arithmetic number, because the mean of its divisors is an integer number (10498337862390).

Almost surely, 2^{77121123216527} is an apocalyptic number.

77121123216527 is a deficient number, since it is larger than the sum of its proper divisors (6865579682593).

77121123216527 is a wasteful number, since it uses less digits than its factorization.

77121123216527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66656113513.

The product of its digits is 493920, while the sum is 47.

The spelling of 77121123216527 in words is "seventy-seven trillion, one hundred twenty-one billion, one hundred twenty-three million, two hundred sixteen thousand, five hundred twenty-seven".