9777664530 has 96 divisors (see below), whose sum is σ = 25817740416. Its totient is φ = 2566916352.

The previous prime is 9777664483. The next prime is 9777664531. The reversal of 9777664530 is 354667779.

It is a super-2 number, since 2×9777664530² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9777664531) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4880509 + ... + 4882511.

It is an arithmetic number, because the mean of its divisors is an integer number (268934796).

Almost surely, 2^9777664530 is an apocalyptic number.

9777664530 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9777664530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12908870208).

9777664530 is an abundant number, since it is smaller than the sum of its proper divisors (16040075886).

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

9777664530 is a wasteful number, since it uses less digits than its factorization.

9777664530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2832 (or 2829 counting only the distinct ones).

The product of its (nonzero) digits is 6667920, while the sum is 54.

The square root of 9777664530 is about 98882.0738556792. The cubic root of 9777664530 is about 2138.3479643714.

The spelling of 9777664530 in words is "nine billion, seven hundred seventy-seven million, six hundred sixty-four thousand, five hundred thirty".