126436634621 has 8 divisors (see below), whose sum is σ = 138004538304. Its totient is φ = 114881008320.

The previous prime is 126436634557. The next prime is 126436634651.

126436634621 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 not a de Polignac number, because 126436634621 - 2⁶ = 126436634557 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 (126436634651) 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, 3047801 + ... + 3089006.

It is an arithmetic number, because the mean of its divisors is an integer number (17250567288).

Almost surely, 2^126436634621 is an apocalyptic number.

126436634621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

126436634621 is a deficient number, since it is larger than the sum of its proper divisors (11567903683).

126436634621 is a wasteful number, since it uses less digits than its factorization.

126436634621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6138691.

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

The spelling of 126436634621 in words is "one hundred twenty-six billion, four hundred thirty-six million, six hundred thirty-four thousand, six hundred twenty-one".