126438901878 has 8 divisors (see below), whose sum is σ = 252877803768. Its totient is φ = 42146300624.

The previous prime is 126438901873. The next prime is 126438901909. The reversal of 126438901878 is 878109834621.

It is a sphenic number, since it is the product of 3 distinct primes.

126438901878 is an admirable number.

It is a super-2 number, since 2×126438901878² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126438901873) 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 3 ways as a sum of consecutive naturals, for example, 10536575151 + ... + 10536575162.

It is an arithmetic number, because the mean of its divisors is an integer number (31609725471).

Almost surely, 2^126438901878 is an apocalyptic number.

126438901878 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

126438901878 is a wasteful number, since it uses less digits than its factorization.

126438901878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21073150318.

The product of its (nonzero) digits is 4644864, while the sum is 57.

The spelling of 126438901878 in words is "one hundred twenty-six billion, four hundred thirty-eight million, nine hundred one thousand, eight hundred seventy-eight".