1642543144415 has 4 divisors (see below), whose sum is σ = 1971051773304. Its totient is φ = 1314034515528.

The previous prime is 1642543144393. The next prime is 1642543144427. The reversal of 1642543144415 is 5144413452461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1642543144415 - 2²² = 1642538950111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164254314437 + ... + 164254314446.

It is an arithmetic number, because the mean of its divisors is an integer number (492762943326).

Almost surely, 2^{1642543144415} is an apocalyptic number.

1642543144415 is a deficient number, since it is larger than the sum of its proper divisors (328508628889).

1642543144415 is an equidigital number, since it uses as much as digits as its factorization.

1642543144415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328508628888.

The product of its digits is 921600, while the sum is 44.

Adding to 1642543144415 its reverse (5144413452461), we get a palindrome (6786956596876).

The spelling of 1642543144415 in words is "one trillion, six hundred forty-two billion, five hundred forty-three million, one hundred forty-four thousand, four hundred fifteen".