3991523687962 has 8 divisors (see below), whose sum is σ = 5987594643156. Its totient is φ = 1995658806912.

The previous prime is 3991523687953. The next prime is 3991523687993. The reversal of 3991523687962 is 2697863251993.

It can be written as a sum of positive squares in 2 ways, for example, as 3233699466001 + 757824221961 = 1798249^2 + 870531^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×3991523687962² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3991523687891 and 3991523687900.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51470103 + ... + 51547594.

Almost surely, 2^{3991523687962} is an apocalyptic number.

3991523687962 is a deficient number, since it is larger than the sum of its proper divisors (1996070955194).

3991523687962 is a wasteful number, since it uses less digits than its factorization.

3991523687962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103037072.

The product of its digits is 264539520, while the sum is 70.

The spelling of 3991523687962 in words is "three trillion, nine hundred ninety-one billion, five hundred twenty-three million, six hundred eighty-seven thousand, nine hundred sixty-two".