9977387520 has 160 divisors (see below), whose sum is σ = 32208688512. Its totient is φ = 2634596352.

The previous prime is 9977387491. The next prime is 9977387531. The reversal of 9977387520 is 257837799.

It is a tau number, because it is divible by the number of its divisors (160).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 784734 + ... + 797346.

Almost surely, 2^9977387520 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 9977387520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16104344256).

9977387520 is an abundant number, since it is smaller than the sum of its proper divisors (22231300992).

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

9977387520 is a wasteful number, since it uses less digits than its factorization.

9977387520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12742 (or 12726 counting only the distinct ones).

The product of its (nonzero) digits is 6667920, while the sum is 57.

The square root of 9977387520 is about 99886.8736121018. The cubic root of 9977387520 is about 2152.8095607642.

The spelling of 9977387520 in words is "nine billion, nine hundred seventy-seven million, three hundred eighty-seven thousand, five hundred twenty".