25651021060 has 144 divisors (see below), whose sum is σ = 66563199360. Its totient is φ = 8127889920.

The previous prime is 25651021057. The next prime is 25651021069. The reversal of 25651021060 is 6012015652.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (25651021069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2065951 + ... + 2078329.

It is an arithmetic number, because the mean of its divisors is an integer number (462244440).

Almost surely, 2^25651021060 is an apocalyptic number.

25651021060 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 25651021060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33281599680).

25651021060 is an abundant number, since it is smaller than the sum of its proper divisors (40912178300).

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

25651021060 is a wasteful number, since it uses less digits than its factorization.

25651021060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12474 (or 12453 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The spelling of 25651021060 in words is "twenty-five billion, six hundred fifty-one million, twenty-one thousand, sixty".