642472274203 has 4 divisors (see below), whose sum is σ = 659836389760. Its totient is φ = 625108158648.

The previous prime is 642472274183. The next prime is 642472274209. The reversal of 642472274203 is 302472274246.

642472274203 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-642472274203 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 642472274203.

It is not an unprimeable number, because it can be changed into a prime (642472274209) 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, 8682057723 + ... + 8682057796.

It is an arithmetic number, because the mean of its divisors is an integer number (164959097440).

Almost surely, 2^642472274203 is an apocalyptic number.

642472274203 is a deficient number, since it is larger than the sum of its proper divisors (17364115557).

642472274203 is a wasteful number, since it uses less digits than its factorization.

642472274203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17364115556.

The product of its (nonzero) digits is 903168, while the sum is 43.

Adding to 642472274203 its sum of digits (43), we get a palindrome (642472274246).

The spelling of 642472274203 in words is "six hundred forty-two billion, four hundred seventy-two million, two hundred seventy-four thousand, two hundred three".