1601417620 has 96 divisors (see below), whose sum is σ = 3748260096. Its totient is φ = 569856000.

The previous prime is 1601417617. The next prime is 1601417639. The reversal of 1601417620 is 267141061.

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, 2154969 + ... + 2155711.

It is an arithmetic number, because the mean of its divisors is an integer number (39044376).

Almost surely, 2^1601417620 is an apocalyptic number.

1601417620 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 1601417620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1874130048).

1601417620 is an abundant number, since it is smaller than the sum of its proper divisors (2146842476).

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

1601417620 is a wasteful number, since it uses less digits than its factorization.

1601417620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961 (or 959 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 1601417620 is about 40017.7163266471. The cubic root of 1601417620 is about 1169.9524221527.

Adding to 1601417620 its reverse (267141061), we get a palindrome (1868558681).

It can be divided in two parts, 160141 and 7620, that added together give a palindrome (167761).

The spelling of 1601417620 in words is "one billion, six hundred one million, four hundred seventeen thousand, six hundred twenty".