642436453 has 8 divisors (see below), whose sum is σ = 656657280. Its totient is φ = 628368000.

The previous prime is 642436451. The next prime is 642436499. The reversal of 642436453 is 354634246.

It is a happy number.

642436453 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 642436453 - 2¹ = 642436451 is a prime.

It is a super-2 number, since 2×642436453² = 825449192286442418, 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 (642436451) 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, 29548 + ... + 46453.

It is an arithmetic number, because the mean of its divisors is an integer number (82082160).

Almost surely, 2^642436453 is an apocalyptic number.

It is an amenable number.

642436453 is a deficient number, since it is larger than the sum of its proper divisors (14220827).

642436453 is a wasteful number, since it uses less digits than its factorization.

642436453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76187.

The product of its digits is 207360, while the sum is 37.

The square root of 642436453 is about 25346.3301682906. The cubic root of 642436453 is about 862.8660701340.

The spelling of 642436453 in words is "six hundred forty-two million, four hundred thirty-six thousand, four hundred fifty-three".