6549166352825 has 24 divisors (see below), whose sum is σ = 8151220955136. Its totient is φ = 5219820144000.

The previous prime is 6549166352821. The next prime is 6549166352849. The reversal of 6549166352825 is 5282536619456.

It is a happy number.

It is not a de Polignac number, because 6549166352825 - 2² = 6549166352821 is a prime.

It is a super-2 number, since 2×6549166352825² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6549166352821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43979444 + ... + 44128106.

It is an arithmetic number, because the mean of its divisors is an integer number (339634206464).

Almost surely, 2^{6549166352825} is an apocalyptic number.

It is an amenable number.

6549166352825 is a deficient number, since it is larger than the sum of its proper divisors (1602054602311).

6549166352825 is a wasteful number, since it uses less digits than its factorization.

6549166352825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155225 (or 155220 counting only the distinct ones).

The product of its digits is 93312000, while the sum is 62.

The spelling of 6549166352825 in words is "six trillion, five hundred forty-nine billion, one hundred sixty-six million, three hundred fifty-two thousand, eight hundred twenty-five".