1909125705416 has 16 divisors (see below), whose sum is σ = 3579693093900. Its totient is φ = 954540880384.

The previous prime is 1909125705413. The next prime is 1909125705469. The reversal of 1909125705416 is 6145075219091.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1226436642916 + 682689062500 = 1107446^2 + 826250^2 .

It is a super-2 number, since 2×1909125705416² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1909125705413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2374301 + ... + 3074988.

Almost surely, 2^{1909125705416} is an apocalyptic number.

It is an amenable number.

1909125705416 is a deficient number, since it is larger than the sum of its proper divisors (1670567388484).

1909125705416 is a wasteful number, since it uses less digits than its factorization.

1909125705416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5493088 (or 5493084 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 50.

The spelling of 1909125705416 in words is "one trillion, nine hundred nine billion, one hundred twenty-five million, seven hundred five thousand, four hundred sixteen".