1601617770 has 144 divisors (see below), whose sum is σ = 4465450080. Its totient is φ = 398181888.

The previous prime is 1601617763. The next prime is 1601617783. The reversal of 1601617770 is 777161061.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3615169 + ... + 3615611.

It is an arithmetic number, because the mean of its divisors is an integer number (31010070).

Almost surely, 2^1601617770 is an apocalyptic number.

1601617770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1601617770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2232725040).

1601617770 is an abundant number, since it is smaller than the sum of its proper divisors (2863832310).

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

1601617770 is a wasteful number, since it uses less digits than its factorization.

1601617770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629 (or 609 counting only the distinct ones).

The product of its (nonzero) digits is 12348, while the sum is 36.

The square root of 1601617770 is about 40020.2170159033. The cubic root of 1601617770 is about 1170.0011615154.

The spelling of 1601617770 in words is "one billion, six hundred one million, six hundred seventeen thousand, seven hundred seventy".