126256542012 has 18 divisors (see below), whose sum is σ = 319148481288. Its totient is φ = 42085513992.

The previous prime is 126256541989. The next prime is 126256542019. The reversal of 126256542012 is 210245652621.

126256542012 is a `hidden beast` number, since 1 + 2 + 62 + 56 + 542 + 0 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 3507126167 = 126256542012 / (1 + 2 + 6 + 2 + 5 + 6 + 5 + 4 + 2 + 0 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126256542019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1753563048 + ... + 1753563119.

Almost surely, 2^126256542012 is an apocalyptic number.

126256542012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

126256542012 is an abundant number, since it is smaller than the sum of its proper divisors (192891939276).

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

126256542012 is a wasteful number, since it uses less digits than its factorization.

126256542012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3507126177 (or 3507126172 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 126256542012 in words is "one hundred twenty-six billion, two hundred fifty-six million, five hundred forty-two thousand, twelve".