77788631405662 has 16 divisors (see below), whose sum is σ = 117618583283712. Its totient is φ = 38582524857240.

The previous prime is 77788631405621. The next prime is 77788631405671. The reversal of 77788631405662 is 26650413688777.

It is a junction number, because it is equal to n+sod(n) for n = 77788631405591 and 77788631405600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20195688 + ... + 23736955.

It is an arithmetic number, because the mean of its divisors is an integer number (7351161455232).

Almost surely, 2^{77788631405662} is an apocalyptic number.

77788631405662 is a deficient number, since it is larger than the sum of its proper divisors (39829951878050).

77788631405662 is a wasteful number, since it uses less digits than its factorization.

77788631405662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43939743.

The product of its (nonzero) digits is 568995840, while the sum is 70.

The spelling of 77788631405662 in words is "seventy-seven trillion, seven hundred eighty-eight billion, six hundred thirty-one million, four hundred five thousand, six hundred sixty-two".