642455010212 has 12 divisors (see below), whose sum is σ = 1124304263040. Its totient is φ = 321225220776.

The previous prime is 642455010181. The next prime is 642455010221. The reversal of 642455010212 is 212010554246.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167993 + ... + 1145919.

It is an arithmetic number, because the mean of its divisors is an integer number (93692021920).

Almost surely, 2^642455010212 is an apocalyptic number.

It is an amenable number.

642455010212 is a deficient number, since it is larger than the sum of its proper divisors (481849252828).

642455010212 is a wasteful number, since it uses less digits than its factorization.

642455010212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142170 (or 1142168 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 642455010212 its reverse (212010554246), we get a palindrome (854465564458).

The spelling of 642455010212 in words is "six hundred forty-two billion, four hundred fifty-five million, ten thousand, two hundred twelve".