6635646453 has 4 divisors (see below), whose sum is σ = 8847528608. Its totient is φ = 4423764300.

The previous prime is 6635646389. The next prime is 6635646461. The reversal of 6635646453 is 3546465366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6635646453 - 2⁶ = 6635646389 is a prime.

It is a super-2 number, since 2×6635646453² = 88063607698422962418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6635646463) 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, 1105941073 + ... + 1105941078.

It is an arithmetic number, because the mean of its divisors is an integer number (2211882152).

Almost surely, 2^6635646453 is an apocalyptic number.

It is an amenable number.

6635646453 is a deficient number, since it is larger than the sum of its proper divisors (2211882155).

6635646453 is a wasteful number, since it uses less digits than its factorization.

6635646453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211882154.

The product of its digits is 4665600, while the sum is 48.

The square root of 6635646453 is about 81459.4773675844. The cubic root of 6635646453 is about 1879.1484045766.

The spelling of 6635646453 in words is "six billion, six hundred thirty-five million, six hundred forty-six thousand, four hundred fifty-three".