7136505225 has 72 divisors (see below), whose sum is σ = 13659136920. Its totient is φ = 3549173760.

The previous prime is 7136505221. The next prime is 7136505227. The reversal of 7136505225 is 5225056317.

7136505225 is a `hidden beast` number, since 71 + 3 + 65 + 0 + 522 + 5 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 2697348096 + 4439157129 = 51936^2 + 66627^2 .

It is not a de Polignac number, because 7136505225 - 2² = 7136505221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7136505225.

It is not an unprimeable number, because it can be changed into a prime (7136505221) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 408367 + ... + 425483.

It is an arithmetic number, because the mean of its divisors is an integer number (189710235).

Almost surely, 2^7136505225 is an apocalyptic number.

7136505225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

7136505225 is a deficient number, since it is larger than the sum of its proper divisors (6522631695).

7136505225 is a wasteful number, since it uses less digits than its factorization.

7136505225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17259 (or 17251 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The square root of 7136505225 is about 84477.8386619828. The cubic root of 7136505225 is about 1925.2857483273.

The spelling of 7136505225 in words is "seven billion, one hundred thirty-six million, five hundred five thousand, two hundred twenty-five".