1691531054169 has 12 divisors (see below), whose sum is σ = 2479048267248. Its totient is φ = 1025170335640.

The previous prime is 1691531054107. The next prime is 1691531054173. The reversal of 1691531054169 is 9614501351961.

It is a happy number.

It is not a de Polignac number, because 1691531054169 - 2¹³ = 1691531045977 is a prime.

It is a super-2 number, since 2×1691531054169² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1691531054179) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2329932219 + ... + 2329932944.

It is an arithmetic number, because the mean of its divisors is an integer number (206587355604).

Almost surely, 2^{1691531054169} is an apocalyptic number.

It is an amenable number.

1691531054169 is a deficient number, since it is larger than the sum of its proper divisors (787517213079).

1691531054169 is a wasteful number, since it uses less digits than its factorization.

1691531054169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4659865188 (or 4659865177 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 51.

The spelling of 1691531054169 in words is "one trillion, six hundred ninety-one billion, five hundred thirty-one million, fifty-four thousand, one hundred sixty-nine".