8161372801 has 4 divisors (see below), whose sum is σ = 8641453572. Its totient is φ = 7681292032.

The previous prime is 8161372799. The next prime is 8161372837. The reversal of 8161372801 is 1082731618.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7350490225 + 810882576 = 85735^2 + 28476^2 .

It is a cyclic number.

It is not a de Polignac number, because 8161372801 - 2¹ = 8161372799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8161379801) 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, 240040360 + ... + 240040393.

It is an arithmetic number, because the mean of its divisors is an integer number (2160363393).

Almost surely, 2^8161372801 is an apocalyptic number.

It is an amenable number.

8161372801 is a deficient number, since it is larger than the sum of its proper divisors (480080771).

8161372801 is a wasteful number, since it uses less digits than its factorization.

8161372801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480080770.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 8161372801 is about 90340.3165867820. The cubic root of 8161372801 is about 2013.3583125169.

The spelling of 8161372801 in words is "eight billion, one hundred sixty-one million, three hundred seventy-two thousand, eight hundred one".