25678280772 has 30 divisors (see below), whose sum is σ = 67128099038. Its totient is φ = 8559426816.

The previous prime is 25678280767. The next prime is 25678280773. The reversal of 25678280772 is 27708287652.

25678280772 is a `hidden beast` number, since 2 + 567 + 8 + 2 + 8 + 0 + 7 + 72 = 666.

It can be written as a sum of positive squares in only one way, i.e., 25646741316 + 31539456 = 160146^2 + 5616^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (25678280773) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 39626653 + ... + 39627300.

Almost surely, 2^25678280772 is an apocalyptic number.

It is an amenable number.

25678280772 is an abundant number, since it is smaller than the sum of its proper divisors (41449818266).

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

25678280772 is a wasteful number, since it uses less digits than its factorization.

25678280772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79253969 (or 79253958 counting only the distinct ones).

The product of its (nonzero) digits is 5268480, while the sum is 54.

The spelling of 25678280772 in words is "twenty-five billion, six hundred seventy-eight million, two hundred eighty thousand, seven hundred seventy-two".