126451779272 has 64 divisors (see below), whose sum is σ = 299698667520. Its totient is φ = 48672845568.

The previous prime is 126451779253. The next prime is 126451779277. The reversal of 126451779272 is 272977154621.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (126451779277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2320328 + ... + 2374199.

It is an arithmetic number, because the mean of its divisors is an integer number (4682791680).

Almost surely, 2^126451779272 is an apocalyptic number.

It is an amenable number.

126451779272 is an abundant number, since it is smaller than the sum of its proper divisors (173246888248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126451779272 is a wasteful number, since it uses less digits than its factorization.

126451779272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4694590 (or 4694586 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 53.

The spelling of 126451779272 in words is "one hundred twenty-six billion, four hundred fifty-one million, seven hundred seventy-nine thousand, two hundred seventy-two".