2545315920 has 320 divisors, whose sum is σ = 10165063680. Its totient is φ = 573350400.

The previous prime is 2545315919. The next prime is 2545315933. The reversal of 2545315920 is 295135452.

It is a happy number.

2545315920 is a `hidden beast` number, since 2 + 54 + 531 + 59 + 20 = 666.

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 63 ways as a sum of consecutive naturals, for example, 1072335 + ... + 1074705.

It is an arithmetic number, because the mean of its divisors is an integer number (31765824).

Almost surely, 2^2545315920 is an apocalyptic number.

2545315920 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 2545315920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5082531840).

2545315920 is an abundant number, since it is smaller than the sum of its proper divisors (7619747760).

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

2545315920 is a wasteful number, since it uses less digits than its factorization.

2545315920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2471 (or 2459 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 2545315920 is about 50451.1240707281. The cubic root of 2545315920 is about 1365.3601754527.

The spelling of 2545315920 in words is "two billion, five hundred forty-five million, three hundred fifteen thousand, nine hundred twenty".