434641166021 has 4 divisors (see below), whose sum is σ = 460208293452. Its totient is φ = 409074038592.

The previous prime is 434641165891. The next prime is 434641166027. The reversal of 434641166021 is 120661146434.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120661146434 = 2 ⋅60330573217.

It can be written as a sum of positive squares in 2 ways, for example, as 278244645121 + 156396520900 = 527489^2 + 395470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-434641166021 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 (434641166027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12783563690 + ... + 12783563723.

It is an arithmetic number, because the mean of its divisors is an integer number (115052073363).

Almost surely, 2^434641166021 is an apocalyptic number.

It is an amenable number.

434641166021 is a deficient number, since it is larger than the sum of its proper divisors (25567127431).

434641166021 is a wasteful number, since it uses less digits than its factorization.

434641166021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25567127430.

The product of its (nonzero) digits is 82944, while the sum is 38.

The spelling of 434641166021 in words is "four hundred thirty-four billion, six hundred forty-one million, one hundred sixty-six thousand, twenty-one".