3991523612352 has 56 divisors (see below), whose sum is σ = 10608264662016. Its totient is φ = 1324541453568.

The previous prime is 3991523612339. The next prime is 3991523612357. The reversal of 3991523612352 is 2532163251993.

It is a junction number, because it is equal to n+sod(n) for n = 3991523612295 and 3991523612304.

It is not an unprimeable number, because it can be changed into a prime (3991523612357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46569708 + ... + 46655339.

It is an arithmetic number, because the mean of its divisors is an integer number (189433297536).

Almost surely, 2^{3991523612352} is an apocalyptic number.

3991523612352 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

3991523612352 is an abundant number, since it is smaller than the sum of its proper divisors (6616741049664).

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

3991523612352 is a wasteful number, since it uses less digits than its factorization.

3991523612352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93225285 (or 93225275 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 51.

The spelling of 3991523612352 in words is "three trillion, nine hundred ninety-one billion, five hundred twenty-three million, six hundred twelve thousand, three hundred fifty-two".