1636040453 has 8 divisors (see below), whose sum is σ = 1655619840. Its totient is φ = 1616487840.

The previous prime is 1636040447. The next prime is 1636040477. The reversal of 1636040453 is 3540406361.

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 1636040453 - 2¹² = 1636036357 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 (1636040443) 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, 133598 + ... + 145328.

It is an arithmetic number, because the mean of its divisors is an integer number (206952480).

Almost surely, 2^1636040453 is an apocalyptic number.

It is an amenable number.

1636040453 is a deficient number, since it is larger than the sum of its proper divisors (19579387).

1636040453 is a wasteful number, since it uses less digits than its factorization.

1636040453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13387.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 1636040453 is about 40447.9968972507. The cubic root of 1636040453 is about 1178.3238802338.

The spelling of 1636040453 in words is "one billion, six hundred thirty-six million, forty thousand, four hundred fifty-three".