25756857036 has 192 divisors, whose sum is σ = 71621222400. Its totient is φ = 7986988800.

The previous prime is 25756857031. The next prime is 25756857037. The reversal of 25756857036 is 63075865752.

25756857036 is a `hidden beast` number, since 2 + 5 + 7 + 5 + 68 + 570 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (25756857031) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30195186 + ... + 30196038.

It is an arithmetic number, because the mean of its divisors is an integer number (373027200).

Almost surely, 2^25756857036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25756857036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35810611200).

25756857036 is an abundant number, since it is smaller than the sum of its proper divisors (45864365364).

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

25756857036 is a wasteful number, since it uses less digits than its factorization.

25756857036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237 (or 1229 counting only the distinct ones).

The product of its (nonzero) digits is 10584000, while the sum is 54.

The spelling of 25756857036 in words is "twenty-five billion, seven hundred fifty-six million, eight hundred fifty-seven thousand, thirty-six".