9999825691464 has 576 divisors, whose sum is σ = 32703794323200. Its totient is φ = 2750427332352.

The previous prime is 9999825691369. The next prime is 9999825691489. The reversal of 9999825691464 is 4641965289999.

9999825691464 is a `hidden beast` number, since 9 + 9 + 9 + 9 + 8 + 2 + 569 + 1 + 46 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 7794095767 + ... + 7794097049.

It is an arithmetic number, because the mean of its divisors is an integer number (56777420700).

Almost surely, 2^{9999825691464} 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 9999825691464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16351897161600).

9999825691464 is an abundant number, since it is smaller than the sum of its proper divisors (22703968631736).

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

9999825691464 is a wasteful number, since it uses less digits than its factorization.

9999825691464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054 (or 2040 counting only the distinct ones).

The product of its digits is 2720977920, while the sum is 81.

The spelling of 9999825691464 in words is "nine trillion, nine hundred ninety-nine billion, eight hundred twenty-five million, six hundred ninety-one thousand, four hundred sixty-four".