25061603868 has 72 divisors (see below), whose sum is σ = 73316705280. Its totient is φ = 7069813920.

The previous prime is 25061603857. The next prime is 25061603869. The reversal of 25061603868 is 86830616052.

25061603868 is a `hidden beast` number, since 2 + 506 + 1 + 60 + 3 + 86 + 8 = 666.

It is a super-2 number, since 2×25061603868² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25061603869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 609528 + ... + 649343.

Almost surely, 2^25061603868 is an apocalyptic number.

25061603868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25061603868 is an abundant number, since it is smaller than the sum of its proper divisors (48255101412).

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

25061603868 is a wasteful number, since it uses less digits than its factorization.

25061603868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258967 (or 1258962 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 25061603868 in words is "twenty-five billion, sixty-one million, six hundred three thousand, eight hundred sixty-eight".