126285978399 has 16 divisors (see below), whose sum is σ = 200802550272. Its totient is φ = 69025876128.

The previous prime is 126285978367. The next prime is 126285978407. The reversal of 126285978399 is 993879582621.

It is not a de Polignac number, because 126285978399 - 2⁵ = 126285978367 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126285978359) by changing a digit.

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, 130730344 + ... + 130731309.

It is an arithmetic number, because the mean of its divisors is an integer number (12550159392).

Almost surely, 2^126285978399 is an apocalyptic number.

126285978399 is a deficient number, since it is larger than the sum of its proper divisors (74516571873).

126285978399 is a wasteful number, since it uses less digits than its factorization.

126285978399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261461686.

The product of its digits is 117573120, while the sum is 69.

The spelling of 126285978399 in words is "one hundred twenty-six billion, two hundred eighty-five million, nine hundred seventy-eight thousand, three hundred ninety-nine".