9906963638544 has 60 divisors (see below), whose sum is σ = 31686558307456. Its totient is φ = 2830561039296.

The previous prime is 9906963638527. The next prime is 9906963638567. The reversal of 9906963638544 is 4458363696099.

It is a happy number.

9906963638544 is a `hidden beast` number, since 9 + 90 + 6 + 96 + 36 + 385 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4914167464 + ... + 4914169479.

Almost surely, 2^{9906963638544} is an apocalyptic number.

It is an amenable number.

9906963638544 is an abundant number, since it is smaller than the sum of its proper divisors (21779594668912).

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

9906963638544 is a wasteful number, since it uses less digits than its factorization.

9906963638544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9828336964 (or 9828336955 counting only the distinct ones).

The product of its (nonzero) digits is 906992640, while the sum is 72.

The spelling of 9906963638544 in words is "nine trillion, nine hundred six billion, nine hundred sixty-three million, six hundred thirty-eight thousand, five hundred forty-four".