642727453643 has 4 divisors (see below), whose sum is σ = 701157222168. Its totient is φ = 584297685120.

The previous prime is 642727453633. The next prime is 642727453721. The reversal of 642727453643 is 346354727246.

642727453643 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 not a de Polignac number, because 642727453643 - 2¹² = 642727449547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642727453603) 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, 29214884246 + ... + 29214884267.

It is an arithmetic number, because the mean of its divisors is an integer number (175289305542).

Almost surely, 2^642727453643 is an apocalyptic number.

642727453643 is a deficient number, since it is larger than the sum of its proper divisors (58429768525).

642727453643 is a wasteful number, since it uses less digits than its factorization.

642727453643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58429768524.

The product of its digits is 20321280, while the sum is 53.

The spelling of 642727453643 in words is "six hundred forty-two billion, seven hundred twenty-seven million, four hundred fifty-three thousand, six hundred forty-three".