1601989488 has 200 divisors, whose sum is σ = 5111922816. Its totient is φ = 480297600.

The previous prime is 1601989483. The next prime is 1601989507. The reversal of 1601989488 is 8849891061.

It is a super-5 number, since 5×1601989488⁵ (a number of 47 digits) contains 55555 as substring. Note that it is a super-d number also for d = 3.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601989483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1467823 + ... + 1468913.

Almost surely, 2^1601989488 is an apocalyptic number.

1601989488 is a gapful number since it is divisible by the number (18) 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 1601989488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2555961408).

1601989488 is an abundant number, since it is smaller than the sum of its proper divisors (3509933328).

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

1601989488 is a wasteful number, since it uses less digits than its factorization.

1601989488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225 (or 1210 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 54.

The square root of 1601989488 is about 40024.8608742117. The cubic root of 1601989488 is about 1170.0916693461.

The spelling of 1601989488 in words is "one billion, six hundred one million, nine hundred eighty-nine thousand, four hundred eighty-eight".