9661835747520 has 168 divisors, whose sum is σ = 36253842889680. Its totient is φ = 2342263203840.

The previous prime is 9661835747489. The next prime is 9661835747527. The reversal of 9661835747520 is 257475381669.

9661835747520 is a `hidden beast` number, since 9 + 6 + 6 + 1 + 8 + 3 + 574 + 7 + 52 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (9661835747527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 152459415 + ... + 152522774.

It is a 1-persistent number, because it is pandigital, but 2⋅9661835747520 = 19323671495040 is not.

Almost surely, 2^{9661835747520} is an apocalyptic number.

9661835747520 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9661835747520 is an abundant number, since it is smaller than the sum of its proper divisors (26592007142160).

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

9661835747520 is a wasteful number, since it uses less digits than its factorization.

9661835747520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304982223 (or 304982210 counting only the distinct ones).

The product of its (nonzero) digits is 76204800, while the sum is 63.

The spelling of 9661835747520 in words is "nine trillion, six hundred sixty-one billion, eight hundred thirty-five million, seven hundred forty-seven thousand, five hundred twenty".