7977487227808 has 240 divisors, whose sum is σ = 19303301687040. Its totient is φ = 3236163840000.

The previous prime is 7977487227799. The next prime is 7977487227823. The reversal of 7977487227808 is 8087227847797.

It is a Harshad number since it is a multiple of its sum of digits (76).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2848084008 + ... + 2848086808.

It is an arithmetic number, because the mean of its divisors is an integer number (80430423696).

Almost surely, 2^{7977487227808} 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 7977487227808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9651650843520).

7977487227808 is an abundant number, since it is smaller than the sum of its proper divisors (11325814459232).

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

7977487227808 is a wasteful number, since it uses less digits than its factorization.

7977487227808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4809 (or 4780 counting only the distinct ones).

The product of its (nonzero) digits is 1239146496, while the sum is 76.

The spelling of 7977487227808 in words is "seven trillion, nine hundred seventy-seven billion, four hundred eighty-seven million, two hundred twenty-seven thousand, eight hundred eight".