77558487496 has 64 divisors (see below), whose sum is σ = 174082867200. Its totient is φ = 31673133888.

The previous prime is 77558487481. The next prime is 77558487499. The reversal of 77558487496 is 69478485577.

It is not an unprimeable number, because it can be changed into a prime (77558487499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224265 + ... + 453223.

It is an arithmetic number, because the mean of its divisors is an integer number (2720044800).

Almost surely, 2^77558487496 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77558487496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87041433600).

77558487496 is an abundant number, since it is smaller than the sum of its proper divisors (96524379704).

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

77558487496 is a wasteful number, since it uses less digits than its factorization.

77558487496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229258 (or 229254 counting only the distinct ones).

The product of its digits is 474163200, while the sum is 70.

The spelling of 77558487496 in words is "seventy-seven billion, five hundred fifty-eight million, four hundred eighty-seven thousand, four hundred ninety-six".