2533840660 has 72 divisors (see below), whose sum is σ = 5917881816. Its totient is φ = 910241280.

The previous prime is 2533840657. The next prime is 2533840679. The reversal of 2533840660 is 660483352.

It can be written as a sum of positive squares in 12 ways, for example, as 1711642384 + 822198276 = 41372^2 + 28674^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114930 + ... + 135190.

It is an arithmetic number, because the mean of its divisors is an integer number (82192803).

Almost surely, 2^2533840660 is an apocalyptic number.

2533840660 is a gapful number since it is divisible by the number (20) 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 2533840660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2958940908).

2533840660 is an abundant number, since it is smaller than the sum of its proper divisors (3384041156).

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

2533840660 is a wasteful number, since it uses less digits than its factorization.

2533840660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20333 (or 20318 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 2533840660 is about 50337.2690955717. The cubic root of 2533840660 is about 1363.3052284796.

The spelling of 2533840660 in words is "two billion, five hundred thirty-three million, eight hundred forty thousand, six hundred sixty".