1909140568356 has 24 divisors (see below), whose sum is σ = 5091041515840. Its totient is φ = 545468733792.

The previous prime is 1909140568351. The next prime is 1909140568369. The reversal of 1909140568356 is 6538650419091.

It is a junction number, because it is equal to n+sod(n) for n = 1909140568296 and 1909140568305.

It is not an unprimeable number, because it can be changed into a prime (1909140568351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11363931871 + ... + 11363932038.

Almost surely, 2^{1909140568356} is an apocalyptic number.

It is an amenable number.

1909140568356 is an abundant number, since it is smaller than the sum of its proper divisors (3181900947484).

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

1909140568356 is a wasteful number, since it uses less digits than its factorization.

1909140568356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22727863923 (or 22727863921 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 57.

The spelling of 1909140568356 in words is "one trillion, nine hundred nine billion, one hundred forty million, five hundred sixty-eight thousand, three hundred fifty-six".