642312605027 has 32 divisors (see below), whose sum is σ = 659760192000. Its totient is φ = 625206822912.

The previous prime is 642312604991. The next prime is 642312605029. The reversal of 642312605027 is 720506213246.

It is a cyclic number.

It is not a de Polignac number, because 642312605027 - 2³² = 638017637731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642312605029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1047817973 + ... + 1047818585.

It is an arithmetic number, because the mean of its divisors is an integer number (20617506000).

Almost surely, 2^642312605027 is an apocalyptic number.

642312605027 is a deficient number, since it is larger than the sum of its proper divisors (17447586973).

642312605027 is a wasteful number, since it uses less digits than its factorization.

642312605027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467.

The product of its (nonzero) digits is 120960, while the sum is 38.

The spelling of 642312605027 in words is "six hundred forty-two billion, three hundred twelve million, six hundred five thousand, twenty-seven".