642230657211 has 32 divisors (see below), whose sum is σ = 1030548556800. Its totient is φ = 350526700800.

The previous prime is 642230657191. The next prime is 642230657221. The reversal of 642230657211 is 112756032246.

It is not a de Polignac number, because 642230657211 - 2⁵ = 642230657179 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 642230657211.

It is not an unprimeable number, because it can be changed into a prime (642230657221) 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, 18239011 + ... + 18274188.

It is an arithmetic number, because the mean of its divisors is an integer number (32204642400).

Almost surely, 2^642230657211 is an apocalyptic number.

642230657211 is a deficient number, since it is larger than the sum of its proper divisors (388317899589).

642230657211 is a wasteful number, since it uses less digits than its factorization.

642230657211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36513267.

The product of its (nonzero) digits is 120960, while the sum is 39.

Adding to 642230657211 its reverse (112756032246), we get a palindrome (754986689457).

The spelling of 642230657211 in words is "six hundred forty-two billion, two hundred thirty million, six hundred fifty-seven thousand, two hundred eleven".