8164515261 has 16 divisors (see below), whose sum is σ = 12870172800. Its totient is φ = 4504559808.

The previous prime is 8164515259. The next prime is 8164515287. The reversal of 8164515261 is 1625154618.

It is not a de Polignac number, because 8164515261 - 2¹ = 8164515259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8164514261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6702606 + ... + 6703823.

It is an arithmetic number, because the mean of its divisors is an integer number (804385800).

Almost surely, 2^8164515261 is an apocalyptic number.

It is an amenable number.

8164515261 is a deficient number, since it is larger than the sum of its proper divisors (4705657539).

8164515261 is a wasteful number, since it uses less digits than its factorization.

8164515261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13406468.

The product of its digits is 57600, while the sum is 39.

The square root of 8164515261 is about 90357.7072584293. The cubic root of 8164515261 is about 2013.6166875988.

Adding to 8164515261 its reverse (1625154618), we get a palindrome (9789669879).

The spelling of 8164515261 in words is "eight billion, one hundred sixty-four million, five hundred fifteen thousand, two hundred sixty-one".