1453618446921 has 9 divisors (see below), whose sum is σ = 2099676314541. Its totient is φ = 969076553292.

The previous prime is 1453618446913. The next prime is 1453618446949. The reversal of 1453618446921 is 1296448163541.

The square root of 1453618446921 is 1205661.

It is a perfect power (a square), and thus also a powerful number.

1453618446921 is a `hidden beast` number, since 1 + 4 + 53 + 61 + 8 + 446 + 92 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1453618446921 - 2³ = 1453618446913 is a prime.

It is a super-2 number, since 2×1453618446921² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1453618446121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3416040 + ... + 3817926.

Almost surely, 2^{1453618446921} is an apocalyptic number.

1453618446921 is the 1205661-st square number.

1453618446921 is the 602831-st centered octagonal number.

It is an amenable number.

1453618446921 is a deficient number, since it is larger than the sum of its proper divisors (646057867620).

1453618446921 is an frugal number, since it uses more digits than its factorization.

1453618446921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803780 (or 401890 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The spelling of 1453618446921 in words is "one trillion, four hundred fifty-three billion, six hundred eighteen million, four hundred forty-six thousand, nine hundred twenty-one".