9919685632 has 88 divisors (see below), whose sum is σ = 20401630200. Its totient is φ = 4817879040.

The previous prime is 9919685597. The next prime is 9919685651. The reversal of 9919685632 is 2365869199.

It can be written as a sum of positive squares in 4 ways, for example, as 3039978496 + 6879707136 = 55136^2 + 82944^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14652078 + ... + 14652754.

Almost surely, 2^9919685632 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 9919685632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10200815100).

9919685632 is an abundant number, since it is smaller than the sum of its proper divisors (10481944568).

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

9919685632 is a wasteful number, since it uses less digits than its factorization.

9919685632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087 (or 1069 counting only the distinct ones).

The product of its digits is 6298560, while the sum is 58.

The square root of 9919685632 is about 99597.6186060691. The cubic root of 9919685632 is about 2148.6514443459.

The spelling of 9919685632 in words is "nine billion, nine hundred nineteen million, six hundred eighty-five thousand, six hundred thirty-two".