77848661112 has 64 divisors (see below), whose sum is σ = 199866713760. Its totient is φ = 25253376000.

The previous prime is 77848661101. The next prime is 77848661113. The reversal of 77848661112 is 21116684877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77848661113) 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, 295938 + ... + 493230.

Almost surely, 2^77848661112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77848661112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99933356880).

77848661112 is an abundant number, since it is smaller than the sum of its proper divisors (122018052648).

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

77848661112 is a wasteful number, since it uses less digits than its factorization.

77848661112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197744 (or 197740 counting only the distinct ones).

The product of its digits is 903168, while the sum is 51.

The spelling of 77848661112 in words is "seventy-seven billion, eight hundred forty-eight million, six hundred sixty-one thousand, one hundred twelve".