2525778720 has 192 divisors, whose sum is σ = 9046477440. Its totient is φ = 657828864.

The previous prime is 2525778713. The next prime is 2525778733. The reversal of 2525778720 is 278775252.

2525778720 is a `hidden beast` number, since 2 + 5 + 2 + 577 + 8 + 72 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 178962 + ... + 192558.

It is an arithmetic number, because the mean of its divisors is an integer number (47117070).

Almost surely, 2^2525778720 is an apocalyptic number.

2525778720 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 2525778720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4523238720).

2525778720 is an abundant number, since it is smaller than the sum of its proper divisors (6520698720).

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

2525778720 is a wasteful number, since it uses less digits than its factorization.

2525778720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13664 (or 13650 counting only the distinct ones).

The product of its (nonzero) digits is 548800, while the sum is 45.

The square root of 2525778720 is about 50257.1260618830. The cubic root of 2525778720 is about 1361.8578127878.

The spelling of 2525778720 in words is "two billion, five hundred twenty-five million, seven hundred seventy-eight thousand, seven hundred twenty".