8725138361 has 4 divisors (see below), whose sum is σ = 9238381812. Its totient is φ = 8211894912.

The previous prime is 8725138337. The next prime is 8725138381. The reversal of 8725138361 is 1638315278.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1638315278 = 2 ⋅819157639.

It can be written as a sum of positive squares in 2 ways, for example, as 5496739600 + 3228398761 = 74140^2 + 56819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8725138361 is a prime.

It is a super-2 number, since 2×8725138361² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8725138321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256621700 + ... + 256621733.

It is an arithmetic number, because the mean of its divisors is an integer number (2309595453).

Almost surely, 2^8725138361 is an apocalyptic number.

It is an amenable number.

8725138361 is a deficient number, since it is larger than the sum of its proper divisors (513243451).

8725138361 is a wasteful number, since it uses less digits than its factorization.

8725138361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513243450.

The product of its digits is 241920, while the sum is 44.

The square root of 8725138361 is about 93408.4490878636. The cubic root of 8725138361 is about 2058.6891431706.

The spelling of 8725138361 in words is "eight billion, seven hundred twenty-five million, one hundred thirty-eight thousand, three hundred sixty-one".