8615977880 has 128 divisors (see below), whose sum is σ = 20708870400. Its totient is φ = 3217024512.

The previous prime is 8615977849. The next prime is 8615977889. The reversal of 8615977880 is 887795168.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8615977889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19448939 + ... + 19449381.

It is an arithmetic number, because the mean of its divisors is an integer number (161788050).

Almost surely, 2^8615977880 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 8615977880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10354435200).

8615977880 is an abundant number, since it is smaller than the sum of its proper divisors (12092892520).

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

8615977880 is a wasteful number, since it uses less digits than its factorization.

8615977880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793 (or 789 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 59.

The square root of 8615977880 is about 92822.2919346425. The cubic root of 8615977880 is about 2050.0676463896.

The spelling of 8615977880 in words is "eight billion, six hundred fifteen million, nine hundred seventy-seven thousand, eight hundred eighty".