77857488188664 has 64 divisors (see below), whose sum is σ = 206488924302240. Its totient is φ = 24378995896320.

The previous prime is 77857488188663. The next prime is 77857488188687. The reversal of 77857488188664 is 46688188475877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77857488188663) 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, 182922919 + ... + 183348054.

Almost surely, 2^{77857488188664} is an apocalyptic number.

It is an amenable number.

77857488188664 is an abundant number, since it is smaller than the sum of its proper divisors (128631436113576).

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

77857488188664 is a wasteful number, since it uses less digits than its factorization.

77857488188664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366271520 (or 366271516 counting only the distinct ones).

The product of its digits is 32369541120, while the sum is 87.

The spelling of 77857488188664 in words is "seventy-seven trillion, eight hundred fifty-seven billion, four hundred eighty-eight million, one hundred eighty-eight thousand, six hundred sixty-four".