77860885622617 has 4 divisors (see below), whose sum is σ = 77867599515876. Its totient is φ = 77854171729360.

The previous prime is 77860885622609. The next prime is 77860885622623. The reversal of 77860885622617 is 71622658806877.

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

It can be written as a sum of positive squares in 2 ways, for example, as 38264876311321 + 39596009311296 = 6185861^2 + 6292536^2 .

It is a cyclic number.

It is not a de Polignac number, because 77860885622617 - 2³ = 77860885622609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77860885622617.

It is not an unprimeable number, because it can be changed into a prime (77860885622687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3356929234 + ... + 3356952427.

It is an arithmetic number, because the mean of its divisors is an integer number (19466899878969).

Almost surely, 2^{77860885622617} is an apocalyptic number.

It is an amenable number.

77860885622617 is a deficient number, since it is larger than the sum of its proper divisors (6713893259).

77860885622617 is a wasteful number, since it uses less digits than its factorization.

77860885622617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6713893258.

The product of its (nonzero) digits is 758661120, while the sum is 73.

The spelling of 77860885622617 in words is "seventy-seven trillion, eight hundred sixty billion, eight hundred eighty-five million, six hundred twenty-two thousand, six hundred seventeen".