126661505063526 has 24 divisors (see below), whose sum is σ = 274481928199440. Its totient is φ = 42213014421936.

The previous prime is 126661505063501. The next prime is 126661505063567. The reversal of 126661505063526 is 625360505166621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 623834505 + ... + 624037508.

It is an arithmetic number, because the mean of its divisors is an integer number (11436747008310).

Almost surely, 2^{126661505063526} is an apocalyptic number.

126661505063526 is an abundant number, since it is smaller than the sum of its proper divisors (147820423135914).

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

126661505063526 is a wasteful number, since it uses less digits than its factorization.

126661505063526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247877660 (or 1247877657 counting only the distinct ones).

The product of its (nonzero) digits is 11664000, while the sum is 54.

The spelling of 126661505063526 in words is "one hundred twenty-six trillion, six hundred sixty-one billion, five hundred five million, sixty-three thousand, five hundred twenty-six".