77988443148 has 432 divisors, whose sum is σ = 262791180288. Its totient is φ = 19047916800.

The previous prime is 77988443131. The next prime is 77988443189. The reversal of 77988443148 is 84134488977.

77988443148 is a `hidden beast` number, since 7 + 79 + 88 + 443 + 1 + 48 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 42779365 + ... + 42781187.

Almost surely, 2^77988443148 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 77988443148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131395590144).

77988443148 is an abundant number, since it is smaller than the sum of its proper divisors (184802737140).

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

77988443148 is a wasteful number, since it uses less digits than its factorization.

77988443148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946 (or 1930 counting only the distinct ones).

The product of its digits is 43352064, while the sum is 63.

The spelling of 77988443148 in words is "seventy-seven billion, nine hundred eighty-eight million, four hundred forty-three thousand, one hundred forty-eight".