25707671604 has 72 divisors (see below), whose sum is σ = 66693186560. Its totient is φ = 8344933632.

The previous prime is 25707671581. The next prime is 25707671629. The reversal of 25707671604 is 40617670752.

25707671604 is a `hidden beast` number, since 2 + 570 + 7 + 6 + 71 + 6 + 0 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 25707671604.

It is a congruent number.

It is an unprimeable number.

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, 497037 + ... + 546315.

Almost surely, 2^25707671604 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 25707671604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33346593280).

25707671604 is an abundant number, since it is smaller than the sum of its proper divisors (40985514956).

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

25707671604 is a wasteful number, since it uses less digits than its factorization.

25707671604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49669 (or 49664 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 45.

The spelling of 25707671604 in words is "twenty-five billion, seven hundred seven million, six hundred seventy-one thousand, six hundred four".