642454614641 has 8 divisors (see below), whose sum is σ = 734726962560. Its totient is φ = 550305546048.

The previous prime is 642454614619. The next prime is 642454614647. The reversal of 642454614641 is 146416454246.

It is a happy number.

642454614641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 642454614641 - 2⁶ = 642454614577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (642454614647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30808661 + ... + 30829506.

It is an arithmetic number, because the mean of its divisors is an integer number (91840870320).

Almost surely, 2^642454614641 is an apocalyptic number.

It is an amenable number.

642454614641 is a deficient number, since it is larger than the sum of its proper divisors (92272347919).

642454614641 is a wasteful number, since it uses less digits than its factorization.

642454614641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61639663.

The product of its digits is 2211840, while the sum is 47.

The spelling of 642454614641 in words is "six hundred forty-two billion, four hundred fifty-four million, six hundred fourteen thousand, six hundred forty-one".