126743478554 has 32 divisors (see below), whose sum is σ = 238350988800. Its totient is φ = 49104696240.

The previous prime is 126743478487. The next prime is 126743478557. The reversal of 126743478554 is 455874347621.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 126743478554.

It is not an unprimeable number, because it can be changed into a prime (126743478557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2271344 + ... + 2326475.

It is an arithmetic number, because the mean of its divisors is an integer number (7448468400).

Almost surely, 2^126743478554 is an apocalyptic number.

126743478554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

126743478554 is a deficient number, since it is larger than the sum of its proper divisors (111607510246).

126743478554 is a wasteful number, since it uses less digits than its factorization.

126743478554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4598018.

The product of its digits is 22579200, while the sum is 56.

The spelling of 126743478554 in words is "one hundred twenty-six billion, seven hundred forty-three million, four hundred seventy-eight thousand, five hundred fifty-four".