1453644661 has 8 divisors (see below), whose sum is σ = 1665276480. Its totient is φ = 1243004928.

The previous prime is 1453644659. The next prime is 1453644677. The reversal of 1453644661 is 1664463541.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1453644661 - 2¹ = 1453644659 is a prime.

It is a super-2 number, since 2×1453644661² = 4226165600907609842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1453644611) 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, 244876 + ... + 250741.

It is an arithmetic number, because the mean of its divisors is an integer number (208159560).

Almost surely, 2^1453644661 is an apocalyptic number.

It is an amenable number.

1453644661 is a deficient number, since it is larger than the sum of its proper divisors (211631819).

1453644661 is an equidigital number, since it uses as much as digits as its factorization.

1453644661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496043.

The product of its digits is 207360, while the sum is 40.

The square root of 1453644661 is about 38126.6922378535. The cubic root of 1453644661 is about 1132.7987275507.

The spelling of 1453644661 in words is "one billion, four hundred fifty-three million, six hundred forty-four thousand, six hundred sixty-one".