126985971249542 has 16 divisors (see below), whose sum is σ = 190740116692800. Its totient is φ = 63405933532032.

The previous prime is 126985971249499. The next prime is 126985971249547. The reversal of 126985971249542 is 245942179589621.

It is a super-2 number, since 2×126985971249542² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 126985971249542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126985971249547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411004334 + ... + 411313182.

It is an arithmetic number, because the mean of its divisors is an integer number (11921257293300).

Almost surely, 2^{126985971249542} is an apocalyptic number.

126985971249542 is a deficient number, since it is larger than the sum of its proper divisors (63754145443258).

126985971249542 is a wasteful number, since it uses less digits than its factorization.

126985971249542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590047.

The product of its digits is 783820800, while the sum is 74.

The spelling of 126985971249542 in words is "one hundred twenty-six trillion, nine hundred eighty-five billion, nine hundred seventy-one million, two hundred forty-nine thousand, five hundred forty-two".