126271787440 has 20 divisors (see below), whose sum is σ = 293581905984. Its totient is φ = 50508714944.

The previous prime is 126271787419. The next prime is 126271787497. The reversal of 126271787440 is 44787172621.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

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, 789198592 + ... + 789198751.

Almost surely, 2^126271787440 is an apocalyptic number.

126271787440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126271787440 is an abundant number, since it is smaller than the sum of its proper divisors (167310118544).

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

126271787440 is a wasteful number, since it uses less digits than its factorization.

126271787440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578397356 (or 1578397350 counting only the distinct ones).

The product of its (nonzero) digits is 1053696, while the sum is 49.

The spelling of 126271787440 in words is "one hundred twenty-six billion, two hundred seventy-one million, seven hundred eighty-seven thousand, four hundred forty".