25677447768 has 160 divisors (see below), whose sum is σ = 87030266400. Its totient is φ = 6904839168.

The previous prime is 25677447737. The next prime is 25677447769. The reversal of 25677447768 is 86774477652.

25677447768 is a `hidden beast` number, since 2 + 56 + 77 + 447 + 76 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25677447769) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 89383 + ... + 243606.

It is an arithmetic number, because the mean of its divisors is an integer number (543939165).

Almost surely, 2^25677447768 is an apocalyptic number.

25677447768 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25677447768 is an abundant number, since it is smaller than the sum of its proper divisors (61352818632).

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

25677447768 is a wasteful number, since it uses less digits than its factorization.

25677447768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333031 (or 333018 counting only the distinct ones).

The product of its digits is 110638080, while the sum is 63.

The spelling of 25677447768 in words is "twenty-five billion, six hundred seventy-seven million, four hundred forty-seven thousand, seven hundred sixty-eight".