169969355641 has 4 divisors (see below), whose sum is σ = 171307697152. Its totient is φ = 168631014132.

The previous prime is 169969355617. The next prime is 169969355663. The reversal of 169969355641 is 146553969961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 146553969961 = 7 ⋅20936281423.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-169969355641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169969365641) 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, 669170565 + ... + 669170818.

It is an arithmetic number, because the mean of its divisors is an integer number (42826924288).

Almost surely, 2^169969355641 is an apocalyptic number.

It is an amenable number.

169969355641 is a deficient number, since it is larger than the sum of its proper divisors (1338341511).

169969355641 is a wasteful number, since it uses less digits than its factorization.

169969355641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338341510.

The product of its digits is 47239200, while the sum is 64.

The spelling of 169969355641 in words is "one hundred sixty-nine billion, nine hundred sixty-nine million, three hundred fifty-five thousand, six hundred forty-one".