126638415669 has 32 divisors (see below), whose sum is σ = 173285324800. Its totient is φ = 82238188032.

The previous prime is 126638415667. The next prime is 126638415677. The reversal of 126638415669 is 966514836621.

It is not a de Polignac number, because 126638415669 - 2¹ = 126638415667 is a prime.

It is a super-2 number, since 2×126638415669² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126638415667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33123492 + ... + 33127314.

It is an arithmetic number, because the mean of its divisors is an integer number (5415166400).

Almost surely, 2^126638415669 is an apocalyptic number.

It is an amenable number.

126638415669 is a deficient number, since it is larger than the sum of its proper divisors (46646909131).

126638415669 is a wasteful number, since it uses less digits than its factorization.

126638415669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5689.

The product of its digits is 11197440, while the sum is 57.

The spelling of 126638415669 in words is "one hundred twenty-six billion, six hundred thirty-eight million, four hundred fifteen thousand, six hundred sixty-nine".