642454065011 has 8 divisors (see below), whose sum is σ = 702844420464. Its totient is φ = 582394616320.

The previous prime is 642454065007. The next prime is 642454065053. The reversal of 642454065011 is 110560454246.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 642454065011 - 2² = 642454065007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642454085011) 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 7 ways as a sum of consecutive naturals, for example, 82722626 + ... + 82730391.

It is an arithmetic number, because the mean of its divisors is an integer number (87855552558).

Almost surely, 2^642454065011 is an apocalyptic number.

642454065011 is a deficient number, since it is larger than the sum of its proper divisors (60390355453).

642454065011 is a wasteful number, since it uses less digits than its factorization.

642454065011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165453381.

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 642454065011 in words is "six hundred forty-two billion, four hundred fifty-four million, sixty-five thousand, eleven".