3999526069968 has 320 divisors, whose sum is σ = 13567931596800. Its totient is φ = 1112046589440.

The previous prime is 3999526069949. The next prime is 3999526069999. The reversal of 3999526069968 is 8699606259993.

3999526069968 is a `hidden beast` number, since 399 + 9 + 52 + 60 + 69 + 9 + 68 = 666.

It is a congruent number.

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, 10122753 + ... + 10510431.

It is an arithmetic number, because the mean of its divisors is an integer number (42399786240).

Almost surely, 2^{3999526069968} 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 3999526069968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6783965798400).

3999526069968 is an abundant number, since it is smaller than the sum of its proper divisors (9568405526832).

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

3999526069968 is a wasteful number, since it uses less digits than its factorization.

3999526069968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387887 (or 387875 counting only the distinct ones).

The product of its (nonzero) digits is 3061100160, while the sum is 81.

The spelling of 3999526069968 in words is "three trillion, nine hundred ninety-nine billion, five hundred twenty-six million, sixty-nine thousand, nine hundred sixty-eight".