77808348040 has 32 divisors (see below), whose sum is σ = 178036056000. Its totient is φ = 30595824064.

The previous prime is 77808347977. The next prime is 77808348043. The reversal of 77808348040 is 4084380877.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (77808348043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16482460 + ... + 16487179.

It is an arithmetic number, because the mean of its divisors is an integer number (5563626750).

Almost surely, 2^77808348040 is an apocalyptic number.

It is an amenable number.

77808348040 is an abundant number, since it is smaller than the sum of its proper divisors (100227707960).

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

77808348040 is a wasteful number, since it uses less digits than its factorization.

77808348040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32969709 (or 32969705 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 49.

The spelling of 77808348040 in words is "seventy-seven billion, eight hundred eight million, three hundred forty-eight thousand, forty".