77860885622557 has 8 divisors (see below), whose sum is σ = 78958075577472. Its totient is φ = 76763711161200.

The previous prime is 77860885622537. The next prime is 77860885622579. The reversal of 77860885622557 is 75522658806877.

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-77860885622557 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 (77860885622537) 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, 6440307 + ... + 14042767.

It is an arithmetic number, because the mean of its divisors is an integer number (9869759447184).

Almost surely, 2^{77860885622557} is an apocalyptic number.

It is an amenable number.

77860885622557 is a deficient number, since it is larger than the sum of its proper divisors (1097189954915).

77860885622557 is a wasteful number, since it uses less digits than its factorization.

77860885622557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7746779.

The product of its (nonzero) digits is 3161088000, while the sum is 76.

The spelling of 77860885622557 in words is "seventy-seven trillion, eight hundred sixty billion, eight hundred eighty-five million, six hundred twenty-two thousand, five hundred fifty-seven".