642344412542501 has 16 divisors (see below), whose sum is σ = 665540195798016. Its totient is φ = 619307523840000.

The previous prime is 642344412542471. The next prime is 642344412542621. The reversal of 642344412542501 is 105245214443246.

It is a cyclic number.

It is not a de Polignac number, because 642344412542501 - 2³⁴ = 642327232673317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642344412542801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25899905 + ... + 44220966.

It is an arithmetic number, because the mean of its divisors is an integer number (41596262237376).

Almost surely, 2^{642344412542501} is an apocalyptic number.

It is an amenable number.

642344412542501 is a deficient number, since it is larger than the sum of its proper divisors (23195783255515).

642344412542501 is a wasteful number, since it uses less digits than its factorization.

642344412542501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70122004.

The product of its (nonzero) digits is 3686400, while the sum is 47.

Adding to 642344412542501 its reverse (105245214443246), we get a palindrome (747589626985747).

The spelling of 642344412542501 in words is "six hundred forty-two trillion, three hundred forty-four billion, four hundred twelve million, five hundred forty-two thousand, five hundred one".