126979211998503 has 24 divisors (see below), whose sum is σ = 191432995200720. Its totient is φ = 81029839213440.

The previous prime is 126979211998363. The next prime is 126979211998547. The reversal of 126979211998503 is 305899112979621.

126979211998503 is a `hidden beast` number, since 1 + 2 + 6 + 9 + 7 + 9 + 21 + 1 + 9 + 98 + 503 = 666.

It is not a de Polignac number, because 126979211998503 - 2¹⁰ = 126979211997479 is a prime.

It is a super-2 number, since 2×126979211998503² (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 (126979211998553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3246368233 + ... + 3246407346.

It is an arithmetic number, because the mean of its divisors is an integer number (7976374800030).

Almost surely, 2^{126979211998503} is an apocalyptic number.

126979211998503 is a deficient number, since it is larger than the sum of its proper divisors (64453783202217).

126979211998503 is a wasteful number, since it uses less digits than its factorization.

126979211998503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6492775679 (or 6492775676 counting only the distinct ones).

The product of its (nonzero) digits is 132269760, while the sum is 72.

The spelling of 126979211998503 in words is "one hundred twenty-six trillion, nine hundred seventy-nine billion, two hundred eleven million, nine hundred ninety-eight thousand, five hundred three".