138207042990462 has 32 divisors (see below), whose sum is σ = 279216686244384. Its totient is φ = 45602129408000.

The previous prime is 138207042990433. The next prime is 138207042990463. The reversal of 138207042990462 is 264099240702831.

It is a happy number.

It is a super-2 number, since 2×138207042990462² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138207042990463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24318003 + ... + 29458094.

It is an arithmetic number, because the mean of its divisors is an integer number (8725521445137).

Almost surely, 2^{138207042990462} is an apocalyptic number.

138207042990462 is an abundant number, since it is smaller than the sum of its proper divisors (141009643253922).

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

138207042990462 is a wasteful number, since it uses less digits than its factorization.

138207042990462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53780444.

The product of its (nonzero) digits is 10450944, while the sum is 57.

The spelling of 138207042990462 in words is "one hundred thirty-eight trillion, two hundred seven billion, forty-two million, nine hundred ninety thousand, four hundred sixty-two".