642645462201 has 32 divisors (see below), whose sum is σ = 927309166080. Its totient is φ = 394563052800.

The previous prime is 642645462169. The next prime is 642645462209. The reversal of 642645462201 is 102264546246.

It is not a de Polignac number, because 642645462201 - 2⁵ = 642645462169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642645462209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104160 + ... + 1138481.

It is an arithmetic number, because the mean of its divisors is an integer number (28978411440).

Almost surely, 2^642645462201 is an apocalyptic number.

It is an amenable number.

642645462201 is a deficient number, since it is larger than the sum of its proper divisors (284663703879).

642645462201 is a wasteful number, since it uses less digits than its factorization.

642645462201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242917.

The product of its (nonzero) digits is 552960, while the sum is 42.

The spelling of 642645462201 in words is "six hundred forty-two billion, six hundred forty-five million, four hundred sixty-two thousand, two hundred one".