77747351680671 has 16 divisors (see below), whose sum is σ = 104206872729600. Its totient is φ = 51559704409280.

The previous prime is 77747351680667. The next prime is 77747351680717. The reversal of 77747351680671 is 17608615374777.

It is a cyclic number.

It is not a de Polignac number, because 77747351680671 - 2² = 77747351680667 is a prime.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 77747351680596 and 77747351680605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77747351680171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65000380 + ... + 66185678.

It is an arithmetic number, because the mean of its divisors is an integer number (6512929545600).

Almost surely, 2^{77747351680671} is an apocalyptic number.

77747351680671 is a deficient number, since it is larger than the sum of its proper divisors (26459521048929).

77747351680671 is a wasteful number, since it uses less digits than its factorization.

77747351680671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299966.

The product of its (nonzero) digits is 290424960, while the sum is 69.

The spelling of 77747351680671 in words is "seventy-seven trillion, seven hundred forty-seven billion, three hundred fifty-one million, six hundred eighty thousand, six hundred seventy-one".