4172164057621 has 16 divisors (see below), whose sum is σ = 4836021995520. Its totient is φ = 3525278848560.

The previous prime is 4172164057613. The next prime is 4172164057631. The reversal of 4172164057621 is 1267504612714.

4172164057621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4172164057621 - 2³ = 4172164057613 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 (4172164057631) 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, 2987920 + ... + 4155958.

It is an arithmetic number, because the mean of its divisors is an integer number (302251374720).

Almost surely, 2^{4172164057621} is an apocalyptic number.

It is an amenable number.

4172164057621 is a deficient number, since it is larger than the sum of its proper divisors (663857937899).

4172164057621 is a wasteful number, since it uses less digits than its factorization.

4172164057621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175304.

The product of its (nonzero) digits is 564480, while the sum is 46.

The spelling of 4172164057621 in words is "four trillion, one hundred seventy-two billion, one hundred sixty-four million, fifty-seven thousand, six hundred twenty-one".