77908694208 has 56 divisors (see below), whose sum is σ = 211704612912. Its totient is φ = 25267682304.

The previous prime is 77908694207. The next prime is 77908694221. The reversal of 77908694208 is 80249680977.

It is not an unprimeable number, because it can be changed into a prime (77908694203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5476335 + ... + 5490542.

Almost surely, 2^77908694208 is an apocalyptic number.

It is an amenable number.

77908694208 is an abundant number, since it is smaller than the sum of its proper divisors (133795918704).

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

77908694208 is a wasteful number, since it uses less digits than its factorization.

77908694208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10966929 (or 10966919 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 60.

The spelling of 77908694208 in words is "seventy-seven billion, nine hundred eight million, six hundred ninety-four thousand, two hundred eight".