126346643621 has 8 divisors (see below), whose sum is σ = 137837618688. Its totient is φ = 114856488000.

The previous prime is 126346643603. The next prime is 126346643623.

126346643621 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126346643621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126346643623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143261 + ... + 522701.

It is an arithmetic number, because the mean of its divisors is an integer number (17229702336).

Almost surely, 2^126346643621 is an apocalyptic number.

126346643621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

126346643621 is a deficient number, since it is larger than the sum of its proper divisors (11490975067).

126346643621 is a wasteful number, since it uses less digits than its factorization.

126346643621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409723.

The product of its digits is 746496, while the sum is 44.

It can be divided in two parts, 126346 and 643621, that added together give a palindrome (769967).

The spelling of 126346643621 in words is "one hundred twenty-six billion, three hundred forty-six million, six hundred forty-three thousand, six hundred twenty-one".