6401161133 has 4 divisors (see below), whose sum is σ = 6464539068. Its totient is φ = 6337783200.

The previous prime is 6401161093. The next prime is 6401161177. The reversal of 6401161133 is 3311611046.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3311611046 = 2 ⋅1655805523.

It can be written as a sum of positive squares in 2 ways, for example, as 5596984969 + 804176164 = 74813^2 + 28358^2 .

It is a cyclic number.

It is not a de Polignac number, because 6401161133 - 2¹⁸ = 6400898989 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 (6401161633) 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, 31688816 + ... + 31689017.

It is an arithmetic number, because the mean of its divisors is an integer number (1616134767).

Almost surely, 2^6401161133 is an apocalyptic number.

It is an amenable number.

6401161133 is a deficient number, since it is larger than the sum of its proper divisors (63377935).

6401161133 is a wasteful number, since it uses less digits than its factorization.

6401161133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63377934.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 6401161133 is about 80007.2567521222. The cubic root of 6401161133 is about 1856.7478079465.

Adding to 6401161133 its reverse (3311611046), we get a palindrome (9712772179).

The spelling of 6401161133 in words is "six billion, four hundred one million, one hundred sixty-one thousand, one hundred thirty-three".