25849044000 has 1440 divisors, whose sum is σ = 114176318256. Its totient is φ = 5673369600.

The previous prime is 25849043939. The next prime is 25849044043. The reversal of 25849044000 is 44094852.

It can be written as a sum of positive squares in 8 ways, for example, as 449609616 + 25399434384 = 21204^2 + 159372^2 .

It is a tau number, because it is divible by the number of its divisors (1440).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 1360475991 + ... + 1360476009.

Almost surely, 2^25849044000 is an apocalyptic number.

25849044000 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 25849044000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57088159128).

25849044000 is an abundant number, since it is smaller than the sum of its proper divisors (88327274256).

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

25849044000 is a wasteful number, since it uses less digits than its factorization.

25849044000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 25849044000 in words is "twenty-five billion, eight hundred forty-nine million, forty-four thousand".