25015267648 has 56 divisors (see below), whose sum is σ = 56866235264. Its totient is φ = 10695283200.

The previous prime is 25015267619. The next prime is 25015267657. The reversal of 25015267648 is 84676251052.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-3 number, since 3×25015267648³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25015267598 and 25015267607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122293 + ... + 254923.

Almost surely, 2^25015267648 is an apocalyptic number.

25015267648 is a gapful number since it is divisible by the number (28) 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 25015267648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28433117632).

25015267648 is an abundant number, since it is smaller than the sum of its proper divisors (31850967616).

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

25015267648 is a wasteful number, since it uses less digits than its factorization.

25015267648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133071 (or 133061 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 25015267648 in words is "twenty-five billion, fifteen million, two hundred sixty-seven thousand, six hundred forty-eight".