3997050661628 has 24 divisors (see below), whose sum is σ = 7036186744944. Its totient is φ = 1986742160000.

The previous prime is 3997050661613. The next prime is 3997050661649. The reversal of 3997050661628 is 8261660507993.

It is a super-2 number, since 2×3997050661628² (a number of 26 digits) contains 22 as substring.

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, 3297575 + ... + 4343742.

It is an arithmetic number, because the mean of its divisors is an integer number (293174447706).

Almost surely, 2^{3997050661628} is an apocalyptic number.

It is an amenable number.

3997050661628 is a deficient number, since it is larger than the sum of its proper divisors (3039136083316).

3997050661628 is a wasteful number, since it uses less digits than its factorization.

3997050661628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7642093 (or 7642091 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 62.

The spelling of 3997050661628 in words is "three trillion, nine hundred ninety-seven billion, fifty million, six hundred sixty-one thousand, six hundred twenty-eight".