2291601816 has 144 divisors (see below), whose sum is σ = 7273211400. Its totient is φ = 649893888.

The previous prime is 2291601797. The next prime is 2291601847. The reversal of 2291601816 is 6181061922.

It is a super-3 number, since 3×2291601816³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 488056 + ... + 492728.

Almost surely, 2^2291601816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2291601816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3636605700).

2291601816 is an abundant number, since it is smaller than the sum of its proper divisors (4981609584).

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

2291601816 is a wasteful number, since it uses less digits than its factorization.

2291601816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4838 (or 4824 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 2291601816 is about 47870.6780399025. The cubic root of 2291601816 is about 1318.3975457972.

The spelling of 2291601816 in words is "two billion, two hundred ninety-one million, six hundred one thousand, eight hundred sixteen".