4581551881 has 2 divisors, whose sum is σ = 4581551882. Its totient is φ = 4581551880.

The previous prime is 4581551851. The next prime is 4581551893. The reversal of 4581551881 is 1881551854.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4335564025 + 245987856 = 65845^2 + 15684^2 .

It is a cyclic number.

It is not a de Polignac number, because 4581551881 - 2⁷ = 4581551753 is a prime.

It is a super-2 number, since 2×4581551881² = 41981235276589276322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4581551851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2290775940 + 2290775941.

It is an arithmetic number, because the mean of its divisors is an integer number (2290775941).

Almost surely, 2^4581551881 is an apocalyptic number.

It is an amenable number.

4581551881 is a deficient number, since it is larger than the sum of its proper divisors (1).

4581551881 is an equidigital number, since it uses as much as digits as its factorization.

4581551881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 256000, while the sum is 46.

The square root of 4581551881 is about 67687.1618624980. The cubic root of 4581551881 is about 1660.8772497074.

The spelling of 4581551881 in words is "four billion, five hundred eighty-one million, five hundred fifty-one thousand, eight hundred eighty-one".