77761128075663 has 8 divisors (see below), whose sum is σ = 106092701870848. Its totient is φ = 50635153165464.

The previous prime is 77761128075647. The next prime is 77761128075677. The reversal of 77761128075663 is 36657082116777.

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

It is not a de Polignac number, because 77761128075663 - 2⁴ = 77761128075647 is a prime.

It is a super-2 number, since 2×77761128075663² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77761128075594 and 77761128075603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77761128175663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301399721095 + ... + 301399721352.

It is an arithmetic number, because the mean of its divisors is an integer number (13261587733856).

Almost surely, 2^{77761128075663} is an apocalyptic number.

77761128075663 is a deficient number, since it is larger than the sum of its proper divisors (28331573795185).

77761128075663 is a wasteful number, since it uses less digits than its factorization.

77761128075663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602799442493.

The product of its (nonzero) digits is 124467840, while the sum is 66.

The spelling of 77761128075663 in words is "seventy-seven trillion, seven hundred sixty-one billion, one hundred twenty-eight million, seventy-five thousand, six hundred sixty-three".