25421192166216 has 64 divisors (see below), whose sum is σ = 79234884679680. Its totient is φ = 6602907055680.

The previous prime is 25421192166197. The next prime is 25421192166257. The reversal of 25421192166216 is 61266129112452.

It is a super-2 number, since 2×25421192166216² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6878026336 + ... + 6878030031.

It is an arithmetic number, because the mean of its divisors is an integer number (1238045073120).

Almost surely, 2^{25421192166216} is an apocalyptic number.

It is an amenable number.

25421192166216 is an abundant number, since it is smaller than the sum of its proper divisors (53813692513464).

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

25421192166216 is a wasteful number, since it uses less digits than its factorization.

25421192166216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13756056394 (or 13756056390 counting only the distinct ones).

The product of its digits is 622080, while the sum is 48.

The spelling of 25421192166216 in words is "twenty-five trillion, four hundred twenty-one billion, one hundred ninety-two million, one hundred sixty-six thousand, two hundred sixteen".