25036646216 has 8 divisors (see below), whose sum is σ = 46943711670. Its totient is φ = 12518323104.

The previous prime is 25036646209. The next prime is 25036646221. The reversal of 25036646216 is 61264663052.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 23424302500 + 1612343716 = 153050^2 + 40154^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1564790381 + ... + 1564790396.

Almost surely, 2^25036646216 is an apocalyptic number.

It is an amenable number.

25036646216 is a deficient number, since it is larger than the sum of its proper divisors (21907065454).

25036646216 is a wasteful number, since it uses less digits than its factorization.

25036646216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3129580783 (or 3129580779 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 25036646216 in words is "twenty-five billion, thirty-six million, six hundred forty-six thousand, two hundred sixteen".