9520991966640 has 320 divisors, whose sum is σ = 36813835763712. Its totient is φ = 1977537408000.

The previous prime is 9520991966639. The next prime is 9520991966671. The reversal of 9520991966640 is 466691990259.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43336909 + ... + 43556051.

Almost surely, 2^{9520991966640} 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 9520991966640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18406917881856).

9520991966640 is an abundant number, since it is smaller than the sum of its proper divisors (27292843797072).

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

9520991966640 is a wasteful number, since it uses less digits than its factorization.

9520991966640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221528 (or 221522 counting only the distinct ones).

The product of its (nonzero) digits is 56687040, while the sum is 66.

The spelling of 9520991966640 in words is "nine trillion, five hundred twenty billion, nine hundred ninety-one million, nine hundred sixty-six thousand, six hundred forty".