4654640213581 has 2 divisors, whose sum is σ = 4654640213582. Its totient is φ = 4654640213580.

The previous prime is 4654640213537. The next prime is 4654640213591. The reversal of 4654640213581 is 1853120464564.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2927295152356 + 1727345061225 = 1710934^2 + 1314285^2 .

It is a cyclic number.

It is not a de Polignac number, because 4654640213581 - 2⁷ = 4654640213453 is a prime.

It is a super-2 number, since 2×4654640213581² (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 (4654640213591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2327320106790 + 2327320106791.

It is an arithmetic number, because the mean of its divisors is an integer number (2327320106791).

Almost surely, 2^{4654640213581} is an apocalyptic number.

It is an amenable number.

4654640213581 is a deficient number, since it is larger than the sum of its proper divisors (1).

4654640213581 is an equidigital number, since it uses as much as digits as its factorization.

4654640213581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2764800, while the sum is 49.

The spelling of 4654640213581 in words is "four trillion, six hundred fifty-four billion, six hundred forty million, two hundred thirteen thousand, five hundred eighty-one".