6169385945 has 4 divisors (see below), whose sum is σ = 7403263140. Its totient is φ = 4935508752.

The previous prime is 6169385941. The next prime is 6169385987. The reversal of 6169385945 is 5495839616.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2990230489 + 3179155456 = 54683^2 + 56384^2 .

It is a cyclic number.

It is not a de Polignac number, because 6169385945 - 2² = 6169385941 is a prime.

It is a super-2 number, since 2×6169385945² = 76122645876727086050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6169385941) 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, 616938590 + ... + 616938599.

It is an arithmetic number, because the mean of its divisors is an integer number (1850815785).

Almost surely, 2^6169385945 is an apocalyptic number.

It is an amenable number.

6169385945 is a deficient number, since it is larger than the sum of its proper divisors (1233877195).

6169385945 is a wasteful number, since it uses less digits than its factorization.

6169385945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233877194.

The product of its digits is 6998400, while the sum is 56.

The square root of 6169385945 is about 78545.4387281655. The cubic root of 6169385945 is about 1834.0618611121.

The spelling of 6169385945 in words is "six billion, one hundred sixty-nine million, three hundred eighty-five thousand, nine hundred forty-five".