4231665415621 has 16 divisors (see below), whose sum is σ = 4874632658944. Its totient is φ = 3598313335344.

The previous prime is 4231665415603. The next prime is 4231665415739. The reversal of 4231665415621 is 1265145661324.

It is a de Polignac number, because none of the positive numbers 2^k-4231665415621 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 (4231665425621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12242656 + ... + 12583558.

It is an arithmetic number, because the mean of its divisors is an integer number (304664541184).

Almost surely, 2^{4231665415621} is an apocalyptic number.

It is an amenable number.

4231665415621 is a deficient number, since it is larger than the sum of its proper divisors (642967243323).

4231665415621 is a wasteful number, since it uses less digits than its factorization.

4231665415621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355000.

The product of its digits is 1036800, while the sum is 46.

The spelling of 4231665415621 in words is "four trillion, two hundred thirty-one billion, six hundred sixty-five million, four hundred fifteen thousand, six hundred twenty-one".