77988981441012 has 96 divisors (see below), whose sum is σ = 193263870965760. Its totient is φ = 24424435178880.

The previous prime is 77988981441011. The next prime is 77988981441089. The reversal of 77988981441012 is 21014418988977.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77988981441011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17778337 + ... + 21726647.

It is an arithmetic number, because the mean of its divisors is an integer number (2013165322560).

Almost surely, 2^{77988981441012} 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 77988981441012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96631935482880).

77988981441012 is an abundant number, since it is smaller than the sum of its proper divisors (115274889524748).

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

77988981441012 is a wasteful number, since it uses less digits than its factorization.

77988981441012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3949613 (or 3949611 counting only the distinct ones).

The product of its (nonzero) digits is 65028096, while the sum is 69.

The spelling of 77988981441012 in words is "seventy-seven trillion, nine hundred eighty-eight billion, nine hundred eighty-one million, four hundred forty-one thousand, twelve".