126291400040 has 64 divisors (see below), whose sum is σ = 306071861760. Its totient is φ = 46621820160.

The previous prime is 126291400033. The next prime is 126291400099. The reversal of 126291400040 is 40004192621.

It is a junction number, because it is equal to n+sod(n) for n = 126291399976 and 126291400012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3134825 + ... + 3174855.

It is an arithmetic number, because the mean of its divisors is an integer number (4782372840).

Almost surely, 2^126291400040 is an apocalyptic number.

126291400040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126291400040 is an abundant number, since it is smaller than the sum of its proper divisors (179780461720).

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

126291400040 is a wasteful number, since it uses less digits than its factorization.

126291400040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46122 (or 46118 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 126291400040 its reverse (40004192621), we get a palindrome (166295592661).

The spelling of 126291400040 in words is "one hundred twenty-six billion, two hundred ninety-one million, four hundred thousand, forty".