25660653504064 has 14 divisors (see below), whose sum is σ = 50920359297254. Its totient is φ = 12830326752000.

The previous prime is 25660653504061. The next prime is 25660653504127. The reversal of 25660653504064 is 46040535606652.

It can be written as a sum of positive squares in only one way, i.e., 23170821977664 + 2489831526400 = 4813608^2 + 1577920^2 .

It is not an unprimeable number, because it can be changed into a prime (25660653504061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200473855437 + ... + 200473855564.

Almost surely, 2^{25660653504064} is an apocalyptic number.

It is an amenable number.

25660653504064 is a deficient number, since it is larger than the sum of its proper divisors (25259705793190).

25660653504064 is an equidigital number, since it uses as much as digits as its factorization.

25660653504064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400947711013 (or 400947711003 counting only the distinct ones).

The product of its (nonzero) digits is 15552000, while the sum is 52.

The spelling of 25660653504064 in words is "twenty-five trillion, six hundred sixty billion, six hundred fifty-three million, five hundred four thousand, sixty-four".