77615381606 has 16 divisors (see below), whose sum is σ = 135885897216. Its totient is φ = 32555995656.

The previous prime is 77615381587. The next prime is 77615381621. The reversal of 77615381606 is 60618351677.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58977596 + ... + 58978911.

It is an arithmetic number, because the mean of its divisors is an integer number (8492868576).

Almost surely, 2^77615381606 is an apocalyptic number.

77615381606 is a deficient number, since it is larger than the sum of its proper divisors (58270515610).

77615381606 is a wasteful number, since it uses less digits than its factorization.

77615381606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117956563.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 77615381606 in words is "seventy-seven billion, six hundred fifteen million, three hundred eighty-one thousand, six hundred six".