126244554377 has 4 divisors (see below), whose sum is σ = 126619167636. Its totient is φ = 125869941120.

The previous prime is 126244554353. The next prime is 126244554407. The reversal of 126244554377 is 773455442621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 773455442621 = 26557 ⋅29124353.

It can be written as a sum of positive squares in 2 ways, for example, as 31690764361 + 94553790016 = 178019^2 + 307496^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126244554377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126244554677) 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, 187306124 + ... + 187306797.

It is an arithmetic number, because the mean of its divisors is an integer number (31654791909).

Almost surely, 2^126244554377 is an apocalyptic number.

It is an amenable number.

126244554377 is a deficient number, since it is larger than the sum of its proper divisors (374613259).

126244554377 is an equidigital number, since it uses as much as digits as its factorization.

126244554377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374613258.

The product of its digits is 5644800, while the sum is 50.

Adding to 126244554377 its reverse (773455442621), we get a palindrome (899699996998).

The spelling of 126244554377 in words is "one hundred twenty-six billion, two hundred forty-four million, five hundred fifty-four thousand, three hundred seventy-seven".