77321658204 has 72 divisors (see below), whose sum is σ = 231076241760. Its totient is φ = 21330110592.

The previous prime is 77321658157. The next prime is 77321658217. The reversal of 77321658204 is 40285612377.

77321658204 is a `hidden beast` number, since 77 + 321 + 6 + 58 + 204 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 77321658204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5282899 + ... + 5297514.

Almost surely, 2^77321658204 is an apocalyptic number.

It is an amenable number.

77321658204 is an abundant number, since it is smaller than the sum of its proper divisors (153754583556).

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

77321658204 is a wasteful number, since it uses less digits than its factorization.

77321658204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10580459 (or 10580454 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 77321658204 in words is "seventy-seven billion, three hundred twenty-one million, six hundred fifty-eight thousand, two hundred four".