169161560640 has 84 divisors (see below), whose sum is σ = 581845294524. Its totient is φ = 45109748736.

The previous prime is 169161560591. The next prime is 169161560641. The reversal of 169161560640 is 46065161961.

169161560640 is a `hidden beast` number, since 16 + 9 + 16 + 1 + 560 + 64 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 22313189376 + 146848371264 = 149376^2 + 383208^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (169161560641) 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, 29365447 + ... + 29371206.

Almost surely, 2^169161560640 is an apocalyptic number.

169161560640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

169161560640 is an abundant number, since it is smaller than the sum of its proper divisors (412683733884).

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

169161560640 is a wasteful number, since it uses less digits than its factorization.

169161560640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58736676 (or 58736663 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 169161560640 in words is "one hundred sixty-nine billion, one hundred sixty-one million, five hundred sixty thousand, six hundred forty".