126821626629 has 8 divisors (see below), whose sum is σ = 170675834400. Its totient is φ = 83757584976.

The previous prime is 126821626571. The next prime is 126821626637. The reversal of 126821626629 is 926626128621.

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

It is not a de Polignac number, because 126821626629 - 2¹² = 126821622533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126821626639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197541154 + ... + 197541795.

It is an arithmetic number, because the mean of its divisors is an integer number (21334479300).

Almost surely, 2^126821626629 is an apocalyptic number.

It is an amenable number.

126821626629 is a deficient number, since it is larger than the sum of its proper divisors (43854207771).

126821626629 is a wasteful number, since it uses less digits than its factorization.

126821626629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395083059.

The product of its digits is 1492992, while the sum is 51.

The spelling of 126821626629 in words is "one hundred twenty-six billion, eight hundred twenty-one million, six hundred twenty-six thousand, six hundred twenty-nine".