3991574612662 has 16 divisors (see below), whose sum is σ = 7369060823712. Its totient is φ = 1579084462080.

The previous prime is 3991574612537. The next prime is 3991574612677. The reversal of 3991574612662 is 2662164751993.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 3991574612662.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10965864139 + ... + 10965864502.

It is an arithmetic number, because the mean of its divisors is an integer number (460566301482).

Almost surely, 2^{3991574612662} is an apocalyptic number.

3991574612662 is a deficient number, since it is larger than the sum of its proper divisors (3377486211050).

3991574612662 is a wasteful number, since it uses less digits than its factorization.

3991574612662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21931728663.

The product of its digits is 29393280, while the sum is 61.

The spelling of 3991574612662 in words is "three trillion, nine hundred ninety-one billion, five hundred seventy-four million, six hundred twelve thousand, six hundred sixty-two".