1909164309869 has 8 divisors (see below), whose sum is σ = 1919308435968. Its totient is φ = 1899021731040.

The previous prime is 1909164309863. The next prime is 1909164309893. The reversal of 1909164309869 is 9689034619091.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1909164309869 - 2¹⁶ = 1909164244333 is a prime.

It is a super-2 number, since 2×1909164309869² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1909164309863) 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, 2130929 + ... + 2891225.

It is an arithmetic number, because the mean of its divisors is an integer number (239913554496).

Almost surely, 2^{1909164309869} is an apocalyptic number.

It is an amenable number.

1909164309869 is a deficient number, since it is larger than the sum of its proper divisors (10144126099).

1909164309869 is a wasteful number, since it uses less digits than its factorization.

1909164309869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773635.

The product of its (nonzero) digits is 22674816, while the sum is 65.

The spelling of 1909164309869 in words is "one trillion, nine hundred nine billion, one hundred sixty-four million, three hundred nine thousand, eight hundred sixty-nine".