77525444020 has 48 divisors (see below), whose sum is σ = 164708183808. Its totient is φ = 30648721280.

The previous prime is 77525443991. The next prime is 77525444069. The reversal of 77525444020 is 2044452577.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 880314 + ... + 964366.

It is an arithmetic number, because the mean of its divisors is an integer number (3431420496).

Almost surely, 2^77525444020 is an apocalyptic number.

It is an amenable number.

77525444020 is an abundant number, since it is smaller than the sum of its proper divisors (87182739788).

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

77525444020 is a wasteful number, since it uses less digits than its factorization.

77525444020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84600 (or 84598 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 40.

Adding to 77525444020 its reverse (2044452577), we get a palindrome (79569896597).

The spelling of 77525444020 in words is "seventy-seven billion, five hundred twenty-five million, four hundred forty-four thousand, twenty".