126132775581049 has 4 divisors (see below), whose sum is σ = 126588128561764. Its totient is φ = 125677422600336.

The previous prime is 126132775581031. The next prime is 126132775581061. The reversal of 126132775581049 is 940185577231621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26460406785024 + 99672368796025 = 5143968^2 + 9983605^2 .

It is a cyclic number.

It is not a de Polignac number, because 126132775581049 - 2¹¹ = 126132775579001 is a prime.

It is a super-3 number, since 3×126132775581049³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126132773581049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227676489942 + ... + 227676490495.

It is an arithmetic number, because the mean of its divisors is an integer number (31647032140441).

It is a 1-persistent number, because it is pandigital, but 2⋅126132775581049 = 252265551162098 is not.

Almost surely, 2^{126132775581049} is an apocalyptic number.

It is an amenable number.

126132775581049 is a deficient number, since it is larger than the sum of its proper divisors (455352980715).

126132775581049 is an equidigital number, since it uses as much as digits as its factorization.

126132775581049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455352980714.

The product of its (nonzero) digits is 25401600, while the sum is 61.

The spelling of 126132775581049 in words is "one hundred twenty-six trillion, one hundred thirty-two billion, seven hundred seventy-five million, five hundred eighty-one thousand, forty-nine".