461722065751421 has 4 divisors (see below), whose sum is σ = 461760309950172. Its totient is φ = 461683821552672.

The previous prime is 461722065751417. The next prime is 461722065751451. The reversal of 461722065751421 is 124157560227164.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 179388145939396 + 282333919812025 = 13393586^2 + 16802795^2 .

It is a cyclic number.

It is not a de Polignac number, because 461722065751421 - 2² = 461722065751417 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 (461722065751451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19122081266 + ... + 19122105411.

It is an arithmetic number, because the mean of its divisors is an integer number (115440077487543).

Almost surely, 2^{461722065751421} is an apocalyptic number.

It is an amenable number.

461722065751421 is a deficient number, since it is larger than the sum of its proper divisors (38244198751).

461722065751421 is a wasteful number, since it uses less digits than its factorization.

461722065751421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38244198750.

The product of its (nonzero) digits is 5644800, while the sum is 53.

The spelling of 461722065751421 in words is "four hundred sixty-one trillion, seven hundred twenty-two billion, sixty-five million, seven hundred fifty-one thousand, four hundred twenty-one".