3974936784591 has 32 divisors (see below), whose sum is σ = 5605957580800. Its totient is φ = 2498319663840.

The previous prime is 3974936784551. The next prime is 3974936784601. The reversal of 3974936784591 is 1954876394793.

It is not a de Polignac number, because 3974936784591 - 2⁷ = 3974936784463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3974936784521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10127670 + ... + 10512828.

It is an arithmetic number, because the mean of its divisors is an integer number (175186174400).

Almost surely, 2^{3974936784591} is an apocalyptic number.

3974936784591 is a deficient number, since it is larger than the sum of its proper divisors (1631020796209).

3974936784591 is a wasteful number, since it uses less digits than its factorization.

3974936784591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386059.

The product of its digits is 1234517760, while the sum is 75.

The spelling of 3974936784591 in words is "three trillion, nine hundred seventy-four billion, nine hundred thirty-six million, seven hundred eighty-four thousand, five hundred ninety-one".