642684001453 has 8 divisors (see below), whose sum is σ = 692273043896. Its totient is φ = 593116646400.

The previous prime is 642684001451. The next prime is 642684001457. The reversal of 642684001453 is 354100486246.

It can be written as a sum of positive squares in 4 ways, for example, as 5947031689 + 636736969764 = 77117^2 + 797958^2 .

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 642684001453 - 2¹ = 642684001451 is a prime.

It is a super-2 number, since 2×642684001453² (a number of 24 digits) 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 (642684001451) 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, 5360268 + ... + 5478853.

It is an arithmetic number, because the mean of its divisors is an integer number (86534130487).

Almost surely, 2^642684001453 is an apocalyptic number.

It is an amenable number.

642684001453 is a deficient number, since it is larger than the sum of its proper divisors (49589042443).

642684001453 is a wasteful number, since it uses less digits than its factorization.

642684001453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10843695.

The product of its (nonzero) digits is 552960, while the sum is 43.

Adding to 642684001453 its reverse (354100486246), we get a palindrome (996784487699).

The spelling of 642684001453 in words is "six hundred forty-two billion, six hundred eighty-four million, one thousand, four hundred fifty-three".