8135401061 has 4 divisors (see below), whose sum is σ = 8140895724. Its totient is φ = 8129906400.

The previous prime is 8135401009. The next prime is 8135401067. The reversal of 8135401061 is 1601045318.

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 5650378561 + 2485022500 = 75169^2 + 49850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8135401061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8135401067) 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, 2745110 + ... + 2748071.

It is an arithmetic number, because the mean of its divisors is an integer number (2035223931).

Almost surely, 2^8135401061 is an apocalyptic number.

It is an amenable number.

8135401061 is a deficient number, since it is larger than the sum of its proper divisors (5494663).

8135401061 is a wasteful number, since it uses less digits than its factorization.

8135401061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5494662.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 8135401061 is about 90196.4581399957. The cubic root of 8135401061 is about 2011.2203558406.

Adding to 8135401061 its reverse (1601045318), we get a palindrome (9736446379).

The spelling of 8135401061 in words is "eight billion, one hundred thirty-five million, four hundred one thousand, sixty-one".