7161805225 has 12 divisors (see below), whose sum is σ = 9167111680. Its totient is φ = 5544622800.

The previous prime is 7161805219. The next prime is 7161805241. The reversal of 7161805225 is 5225081617.

It is not a de Polignac number, because 7161805225 - 2⁵ = 7161805193 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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 in 11 ways as a sum of consecutive naturals, for example, 4619745 + ... + 4621294.

Almost surely, 2^7161805225 is an apocalyptic number.

It is an amenable number.

7161805225 is a deficient number, since it is larger than the sum of its proper divisors (2005306455).

7161805225 is a wasteful number, since it uses less digits than its factorization.

7161805225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9241080 (or 9241075 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 7161805225 is about 84627.4495952702. The cubic root of 7161805225 is about 1927.5582089532.

The spelling of 7161805225 in words is "seven billion, one hundred sixty-one million, eight hundred five thousand, two hundred twenty-five".