169609348790640 has 480 divisors, whose sum is σ = 650951072179200. Its totient is φ = 39197045422080.

The previous prime is 169609348790603. The next prime is 169609348790659. The reversal of 169609348790640 is 46097843906961.

169609348790640 is a `hidden beast` number, since 1 + 6 + 9 + 609 + 3 + 4 + 8 + 7 + 9 + 0 + 6 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 13470927 + ... + 22818513.

It is an arithmetic number, because the mean of its divisors is an integer number (1356148067040).

Almost surely, 2^{169609348790640} is an apocalyptic number.

169609348790640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 169609348790640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325475536089600).

169609348790640 is an abundant number, since it is smaller than the sum of its proper divisors (481341723388560).

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

169609348790640 is a wasteful number, since it uses less digits than its factorization.

169609348790640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9347725 (or 9347716 counting only the distinct ones).

The product of its (nonzero) digits is 423263232, while the sum is 72.

The spelling of 169609348790640 in words is "one hundred sixty-nine trillion, six hundred nine billion, three hundred forty-eight million, seven hundred ninety thousand, six hundred forty".