126913444449 has 64 divisors (see below), whose sum is σ = 201468518400. Its totient is φ = 70207948800.

The previous prime is 126913444447. The next prime is 126913444453. The reversal of 126913444449 is 944444319621.

It is a happy number.

It is not a de Polignac number, because 126913444449 - 2¹ = 126913444447 is a prime.

It is a super-2 number, since 2×126913444449² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (126913444447) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4436817 + ... + 4465329.

It is an arithmetic number, because the mean of its divisors is an integer number (3147945600).

Almost surely, 2^126913444449 is an apocalyptic number.

126913444449 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

126913444449 is a deficient number, since it is larger than the sum of its proper divisors (74555073951).

126913444449 is a wasteful number, since it uses less digits than its factorization.

126913444449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28806.

The product of its digits is 2985984, while the sum is 51.

The spelling of 126913444449 in words is "one hundred twenty-six billion, nine hundred thirteen million, four hundred forty-four thousand, four hundred forty-nine".