7977395808 has 120 divisors (see below), whose sum is σ = 24481538928. Its totient is φ = 2543498496.

The previous prime is 7977395791. The next prime is 7977395813. The reversal of 7977395808 is 8085937797.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7291 + ... + 126522.

Almost surely, 2^7977395808 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 7977395808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12240769464).

7977395808 is an abundant number, since it is smaller than the sum of its proper divisors (16504143120).

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

7977395808 is a wasteful number, since it uses less digits than its factorization.

7977395808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133858 (or 133841 counting only the distinct ones).

The product of its (nonzero) digits is 26671680, while the sum is 63.

The square root of 7977395808 is about 89316.2684397417. The cubic root of 7977395808 is about 1998.1145404130.

The spelling of 7977395808 in words is "seven billion, nine hundred seventy-seven million, three hundred ninety-five thousand, eight hundred eight".