126874686478621 has 4 divisors (see below), whose sum is σ = 130967418300544. Its totient is φ = 122781954656700.

The previous prime is 126874686478591. The next prime is 126874686478663.

126874686478621 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126874686478621 - 2¹⁹ = 126874685954333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126874686472621) 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 3 ways as a sum of consecutive naturals, for example, 2046365910915 + ... + 2046365910976.

It is an arithmetic number, because the mean of its divisors is an integer number (32741854575136).

Almost surely, 2^{126874686478621} is an apocalyptic number.

It is an amenable number.

126874686478621 is a deficient number, since it is larger than the sum of its proper divisors (4092731821923).

126874686478621 is an equidigital number, since it uses as much as digits as its factorization.

126874686478621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4092731821922.

The product of its digits is 2080899072, while the sum is 76.

The spelling of 126874686478621 in words is "one hundred twenty-six trillion, eight hundred seventy-four billion, six hundred eighty-six million, four hundred seventy-eight thousand, six hundred twenty-one".