126621660342 has 32 divisors (see below), whose sum is σ = 255167677440. Its totient is φ = 41887036800.

The previous prime is 126621660323. The next prime is 126621660367. The reversal of 126621660342 is 243066126621.

It is a self number, because there is not a number n which added to its sum of digits gives 126621660342.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 874078 + ... + 1008590.

It is an arithmetic number, because the mean of its divisors is an integer number (7973989920).

Almost surely, 2^126621660342 is an apocalyptic number.

126621660342 is an abundant number, since it is smaller than the sum of its proper divisors (128546017098).

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

126621660342 is a wasteful number, since it uses less digits than its factorization.

126621660342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135708.

The product of its (nonzero) digits is 124416, while the sum is 39.

Adding to 126621660342 its reverse (243066126621), we get a palindrome (369687786963).

The spelling of 126621660342 in words is "one hundred twenty-six billion, six hundred twenty-one million, six hundred sixty thousand, three hundred forty-two".