77081881452 has 12 divisors (see below), whose sum is σ = 179857723416. Its totient is φ = 25693960480.

The previous prime is 77081881447. The next prime is 77081881463. The reversal of 77081881452 is 25418818077.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 77081881395 and 77081881404.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3211745049 + ... + 3211745072.

It is an arithmetic number, because the mean of its divisors is an integer number (14988143618).

Almost surely, 2^77081881452 is an apocalyptic number.

It is an amenable number.

77081881452 is an abundant number, since it is smaller than the sum of its proper divisors (102775841964).

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

77081881452 is a wasteful number, since it uses less digits than its factorization.

77081881452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6423490128 (or 6423490126 counting only the distinct ones).

The product of its (nonzero) digits is 1003520, while the sum is 51.

The spelling of 77081881452 in words is "seventy-seven billion, eighty-one million, eight hundred eighty-one thousand, four hundred fifty-two".