1909125705408 has 28 divisors (see below), whose sum is σ = 5051228429400. Its totient is φ = 636375235072.

The previous prime is 1909125705349. The next prime is 1909125705413. The reversal of 1909125705408 is 8045075219091.

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, 4971681333 + ... + 4971681716.

Almost surely, 2^{1909125705408} is an apocalyptic number.

It is an amenable number.

1909125705408 is an abundant number, since it is smaller than the sum of its proper divisors (3142102723992).

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

1909125705408 is an equidigital number, since it uses as much as digits as its factorization.

1909125705408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9943363064 (or 9943363054 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 51.

The spelling of 1909125705408 in words is "one trillion, nine hundred nine billion, one hundred twenty-five million, seven hundred five thousand, four hundred eight".