4611204432581 has 2 divisors, whose sum is σ = 4611204432582. Its totient is φ = 4611204432580.

The previous prime is 4611204432577. The next prime is 4611204432689. The reversal of 4611204432581 is 1852344021164.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4350457350625 + 260747081956 = 2085775^2 + 510634^2 .

It is a cyclic number.

It is not a de Polignac number, because 4611204432581 - 2² = 4611204432577 is a prime.

It is a super-2 number, since 2×4611204432581² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4611204432881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2305602216290 + 2305602216291.

It is an arithmetic number, because the mean of its divisors is an integer number (2305602216291).

Almost surely, 2^{4611204432581} is an apocalyptic number.

It is an amenable number.

4611204432581 is a deficient number, since it is larger than the sum of its proper divisors (1).

4611204432581 is an equidigital number, since it uses as much as digits as its factorization.

4611204432581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 184320, while the sum is 41.

The spelling of 4611204432581 in words is "four trillion, six hundred eleven billion, two hundred four million, four hundred thirty-two thousand, five hundred eighty-one".