77255020242 has 48 divisors (see below), whose sum is σ = 174952307712. Its totient is φ = 25548883920.

The previous prime is 77255020207. The next prime is 77255020261. The reversal of 77255020242 is 24202055277.

It is a junction number, because it is equal to n+sod(n) for n = 77255020197 and 77255020206.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 564109 + ... + 687552.

It is an arithmetic number, because the mean of its divisors is an integer number (3644839744).

Almost surely, 2^77255020242 is an apocalyptic number.

77255020242 is an abundant number, since it is smaller than the sum of its proper divisors (97697287470).

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

77255020242 is a wasteful number, since it uses less digits than its factorization.

77255020242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251805 (or 1251793 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 36.

The spelling of 77255020242 in words is "seventy-seven billion, two hundred fifty-five million, twenty thousand, two hundred forty-two".