25024778730 has 144 divisors (see below), whose sum is σ = 75751303680. Its totient is φ = 5715105984.

The previous prime is 25024778699. The next prime is 25024778749. The reversal of 25024778730 is 3787742052.

25024778730 is a `hidden beast` number, since 2 + 502 + 4 + 7 + 78 + 73 + 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 71 ways as a sum of consecutive naturals, for example, 9202311 + ... + 9205029.

It is an arithmetic number, because the mean of its divisors is an integer number (526050720).

Almost surely, 2^25024778730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25024778730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37875651840).

25024778730 is an abundant number, since it is smaller than the sum of its proper divisors (50726524950).

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

25024778730 is a wasteful number, since it uses less digits than its factorization.

25024778730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4833 (or 4823 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 45.

The spelling of 25024778730 in words is "twenty-five billion, twenty-four million, seven hundred seventy-eight thousand, seven hundred thirty".