1608621534720 has 800 divisors, whose sum is σ = 6125476024800. Its totient is φ = 403476774912.

The previous prime is 1608621534713. The next prime is 1608621534727. The reversal of 1608621534720 is 274351268061.

1608621534720 is a `hidden beast` number, since 1 + 608 + 6 + 2 + 1 + 5 + 34 + 7 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1608621534713) and next prime (1608621534727).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1608621534727) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1018758891 + ... + 1018760469.

It is an arithmetic number, because the mean of its divisors is an integer number (7656845031).

Almost surely, 2^{1608621534720} is an apocalyptic number.

1608621534720 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 1608621534720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3062738012400).

1608621534720 is an abundant number, since it is smaller than the sum of its proper divisors (4516854490080).

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

1608621534720 is an frugal number, since it uses more digits than its factorization.

1608621534720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665 (or 1606 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 1608621534720 in words is "one trillion, six hundred eight billion, six hundred twenty-one million, five hundred thirty-four thousand, seven hundred twenty".