2591745660 has 576 divisors, whose sum is σ = 10038712320. Its totient is φ = 548674560.

The previous prime is 2591745617. The next prime is 2591745677. The reversal of 2591745660 is 665471952.

2591745660 is a `hidden beast` number, since 2 + 591 + 7 + 4 + 56 + 6 + 0 = 666.

It is a super-2 number, since 2×2591745660² = 13434291132257671200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 191 ways as a sum of consecutive naturals, for example, 36503425 + ... + 36503495.

It is an arithmetic number, because the mean of its divisors is an integer number (17428320).

Almost surely, 2^2591745660 is an apocalyptic number.

2591745660 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 2591745660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5019356160).

2591745660 is an abundant number, since it is smaller than the sum of its proper divisors (7446966660).

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

2591745660 is a wasteful number, since it uses less digits than its factorization.

2591745660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The square root of 2591745660 is about 50909.1903294484. The cubic root of 2591745660 is about 1373.6121595603.

The spelling of 2591745660 in words is "two billion, five hundred ninety-one million, seven hundred forty-five thousand, six hundred sixty".