1722452661 has 8 divisors (see below), whose sum is σ = 2551781760. Its totient is φ = 1148301756.

The previous prime is 1722452617. The next prime is 1722452729. The reversal of 1722452661 is 1662542271.

It is a happy number.

1722452661 is a `hidden beast` number, since 1 + 72 + 2 + 4 + 526 + 61 = 666.

It is not a de Polignac number, because 1722452661 - 2⁷ = 1722452533 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1722452761) 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, 31897245 + ... + 31897298.

It is an arithmetic number, because the mean of its divisors is an integer number (318972720).

Almost surely, 2^1722452661 is an apocalyptic number.

It is an amenable number.

1722452661 is a deficient number, since it is larger than the sum of its proper divisors (829329099).

1722452661 is an equidigital number, since it uses as much as digits as its factorization.

1722452661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63794552 (or 63794546 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 1722452661 is about 41502.4416269694. The cubic root of 1722452661 is about 1198.7145171867.

The spelling of 1722452661 in words is "one billion, seven hundred twenty-two million, four hundred fifty-two thousand, six hundred sixty-one".