464144542681 has 2 divisors, whose sum is σ = 464144542682. Its totient is φ = 464144542680.

The previous prime is 464144542649. The next prime is 464144542691. The reversal of 464144542681 is 186245441464.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 416949152656 + 47195390025 = 645716^2 + 217245^2 .

It is a cyclic number.

It is not a de Polignac number, because 464144542681 - 2⁵ = 464144542649 is a prime.

It is a super-2 number, since 2×464144542681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (464144542691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 232072271340 + 232072271341.

It is an arithmetic number, because the mean of its divisors is an integer number (232072271341).

Almost surely, 2^464144542681 is an apocalyptic number.

It is an amenable number.

464144542681 is a deficient number, since it is larger than the sum of its proper divisors (1).

464144542681 is an equidigital number, since it uses as much as digits as its factorization.

464144542681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2949120, while the sum is 49.

The spelling of 464144542681 in words is "four hundred sixty-four billion, one hundred forty-four million, five hundred forty-two thousand, six hundred eighty-one".