126256634380 has 48 divisors (see below), whose sum is σ = 279137990880. Its totient is φ = 47837011968.

The previous prime is 126256634347. The next prime is 126256634381. The reversal of 126256634380 is 83436652621.

It is a self number, because there is not a number n which added to its sum of digits gives 126256634380.

It is not an unprimeable number, because it can be changed into a prime (126256634381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2750094 + ... + 2795626.

It is an arithmetic number, because the mean of its divisors is an integer number (5815374810).

Almost surely, 2^126256634380 is an apocalyptic number.

126256634380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126256634380 is an abundant number, since it is smaller than the sum of its proper divisors (152881356500).

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

126256634380 is a wasteful number, since it uses less digits than its factorization.

126256634380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52858 (or 52856 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 126256634380 in words is "one hundred twenty-six billion, two hundred fifty-six million, six hundred thirty-four thousand, three hundred eighty".