453654136021 has 4 divisors (see below), whose sum is σ = 480339673452. Its totient is φ = 426968598592.

The previous prime is 453654136007. The next prime is 453654136043. The reversal of 453654136021 is 120631456354.

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 157049727025 + 296604408996 = 396295^2 + 544614^2 .

It is a cyclic number.

It is not a de Polignac number, because 453654136021 - 2⁹ = 453654135509 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 (453654136051) 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, 13342768690 + ... + 13342768723.

It is an arithmetic number, because the mean of its divisors is an integer number (120084918363).

Almost surely, 2^453654136021 is an apocalyptic number.

It is an amenable number.

453654136021 is a deficient number, since it is larger than the sum of its proper divisors (26685537431).

453654136021 is a wasteful number, since it uses less digits than its factorization.

453654136021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26685537430.

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 453654136021 in words is "four hundred fifty-three billion, six hundred fifty-four million, one hundred thirty-six thousand, twenty-one".