77757736708061 has 16 divisors (see below), whose sum is σ = 83851473076800. Its totient is φ = 71868120766848.

The previous prime is 77757736708049. The next prime is 77757736708139. The reversal of 77757736708061 is 16080763775777.

It is a cyclic number.

It is not a de Polignac number, because 77757736708061 - 2¹⁰ = 77757736707037 is a prime.

It is a super-2 number, since 2×77757736708061² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (71) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77757736708021) 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, 54827666 + ... + 56228003.

It is an arithmetic number, because the mean of its divisors is an integer number (5240717067300).

Almost surely, 2^{77757736708061} is an apocalyptic number.

It is an amenable number.

77757736708061 is a deficient number, since it is larger than the sum of its proper divisors (6093736368739).

77757736708061 is a wasteful number, since it uses less digits than its factorization.

77757736708061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111056588.

The product of its (nonzero) digits is 508243680, while the sum is 71.

The spelling of 77757736708061 in words is "seventy-seven trillion, seven hundred fifty-seven billion, seven hundred thirty-six million, seven hundred eight thousand, sixty-one".