642472101274193 has 12 divisors (see below), whose sum is σ = 655025739136860. Its totient is φ = 630154762026816.

The previous prime is 642472101274153. The next prime is 642472101274261. The reversal of 642472101274193 is 391472101274246.

It can be written as a sum of positive squares in 6 ways, for example, as 11546723414209 + 630925377859984 = 3398047^2 + 25118228^2 .

It is not a de Polignac number, because 642472101274193 - 2⁴⁴ = 624879915229777 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642472101274153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26346146 + ... + 44486667.

It is an arithmetic number, because the mean of its divisors is an integer number (54585478261405).

Almost surely, 2^{642472101274193} is an apocalyptic number.

It is an amenable number.

642472101274193 is a deficient number, since it is larger than the sum of its proper divisors (12553637862667).

642472101274193 is an equidigital number, since it uses as much as digits as its factorization.

642472101274193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70836148 (or 70836095 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 53.

Adding to 642472101274193 its sum of digits (53), we get a palindrome (642472101274246).

The spelling of 642472101274193 in words is "six hundred forty-two trillion, four hundred seventy-two billion, one hundred one million, two hundred seventy-four thousand, one hundred ninety-three".