77732347081686 has 64 divisors (see below), whose sum is σ = 178549113196800. Its totient is φ = 22312373529600.

The previous prime is 77732347081679. The next prime is 77732347081703. The reversal of 77732347081686 is 68618074323777.

It is a self number, because there is not a number n which added to its sum of digits gives 77732347081686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4592206 + ... + 13287326.

It is an arithmetic number, because the mean of its divisors is an integer number (2789829893700).

Almost surely, 2^{77732347081686} is an apocalyptic number.

77732347081686 is an abundant number, since it is smaller than the sum of its proper divisors (100816766115114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77732347081686 is a wasteful number, since it uses less digits than its factorization.

77732347081686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8702285.

The product of its (nonzero) digits is 398297088, while the sum is 69.

The spelling of 77732347081686 in words is "seventy-seven trillion, seven hundred thirty-two billion, three hundred forty-seven million, eighty-one thousand, six hundred eighty-six".