9642776640 has 336 divisors, whose sum is σ = 37492228800. Its totient is φ = 2087866368.

The previous prime is 9642776623. The next prime is 9642776683. The reversal of 9642776640 is 466772469.

It is a tau number, because it is divible by the number of its divisors (336).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 888366 + ... + 899154.

Almost surely, 2^9642776640 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 9642776640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18746114400).

9642776640 is an abundant number, since it is smaller than the sum of its proper divisors (27849452160).

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

9642776640 is a wasteful number, since it uses less digits than its factorization.

9642776640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10842 (or 10825 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 51.

The square root of 9642776640 is about 98197.6407048560. The cubic root of 9642776640 is about 2128.4691947870.

The spelling of 9642776640 in words is "nine billion, six hundred forty-two million, seven hundred seventy-six thousand, six hundred forty".