80777350428 has 12 divisors (see below), whose sum is σ = 188480484360. Its totient is φ = 26925783472.

The previous prime is 80777350427. The next prime is 80777350441. The reversal of 80777350428 is 82405377708.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80777350427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3365722923 + ... + 3365722946.

It is an arithmetic number, because the mean of its divisors is an integer number (15706707030).

Almost surely, 2^80777350428 is an apocalyptic number.

It is an amenable number.

80777350428 is an abundant number, since it is smaller than the sum of its proper divisors (107703133932).

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

80777350428 is a wasteful number, since it uses less digits than its factorization.

80777350428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6731445876 (or 6731445874 counting only the distinct ones).

The product of its (nonzero) digits is 2634240, while the sum is 51.

The spelling of 80777350428 in words is "eighty billion, seven hundred seventy-seven million, three hundred fifty thousand, four hundred twenty-eight".