2545217730 has 192 divisors, whose sum is σ = 7823806848. Its totient is φ = 567060480.

The previous prime is 2545217699. The next prime is 2545217749. The reversal of 2545217730 is 377125452.

2545217730 is a `hidden beast` number, since 2 + 5 + 452 + 177 + 30 = 666.

2545217730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 721932 + ... + 725448.

It is an arithmetic number, because the mean of its divisors is an integer number (40748994).

Almost surely, 2^2545217730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2545217730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3911903424).

2545217730 is an abundant number, since it is smaller than the sum of its proper divisors (5278589118).

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

2545217730 is a wasteful number, since it uses less digits than its factorization.

2545217730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3601 (or 3598 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 36.

The square root of 2545217730 is about 50450.1509413005. The cubic root of 2545217730 is about 1365.3426181771.

The spelling of 2545217730 in words is "two billion, five hundred forty-five million, two hundred seventeen thousand, seven hundred thirty".