207138138042 has 32 divisors (see below), whose sum is σ = 452640706560. Its totient is φ = 62671500720.

The previous prime is 207138138037. The next prime is 207138138127. The reversal of 207138138042 is 240831831702.

207138138042 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2398042 + ... + 2482917.

It is an arithmetic number, because the mean of its divisors is an integer number (14145022080).

Almost surely, 2^207138138042 is an apocalyptic number.

207138138042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

207138138042 is an abundant number, since it is smaller than the sum of its proper divisors (245502568518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

207138138042 is a wasteful number, since it uses less digits than its factorization.

207138138042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4881618.

The product of its (nonzero) digits is 64512, while the sum is 39.

Adding to 207138138042 its reverse (240831831702), we get a palindrome (447969969744).

The spelling of 207138138042 in words is "two hundred seven billion, one hundred thirty-eight million, one hundred thirty-eight thousand, forty-two".