4020591685631 has 8 divisors (see below), whose sum is σ = 4065863907600. Its totient is φ = 3975321620160.

The previous prime is 4020591685541. The next prime is 4020591685651. The reversal of 4020591685631 is 1365861950204.

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

It is a cyclic number.

It is not a de Polignac number, because 4020591685631 - 2²⁶ = 4020524576767 is a prime.

It is a super-2 number, since 2×4020591685631² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4020591685631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020591685651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3369296 + ... + 4403786.

It is an arithmetic number, because the mean of its divisors is an integer number (508232988450).

Almost surely, 2^{4020591685631} is an apocalyptic number.

4020591685631 is a deficient number, since it is larger than the sum of its proper divisors (45272221969).

4020591685631 is a wasteful number, since it uses less digits than its factorization.

4020591685631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078249.

The product of its (nonzero) digits is 1555200, while the sum is 50.

The spelling of 4020591685631 in words is "four trillion, twenty billion, five hundred ninety-one million, six hundred eighty-five thousand, six hundred thirty-one".