1601664610620 has 96 divisors (see below), whose sum is σ = 4561267152960. Its totient is φ = 419870218240.

The previous prime is 1601664610561. The next prime is 1601664610631. The reversal of 1601664610620 is 260164661061.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56950 + ... + 1790690.

It is an arithmetic number, because the mean of its divisors is an integer number (47513199510).

Almost surely, 2^{1601664610620} is an apocalyptic number.

1601664610620 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 1601664610620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2280633576480).

1601664610620 is an abundant number, since it is smaller than the sum of its proper divisors (2959602542340).

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

1601664610620 is a wasteful number, since it uses less digits than its factorization.

1601664610620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734015 (or 1734013 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The spelling of 1601664610620 in words is "one trillion, six hundred one billion, six hundred sixty-four million, six hundred ten thousand, six hundred twenty".