464144542649 has 2 divisors, whose sum is σ = 464144542650. Its totient is φ = 464144542648.

The previous prime is 464144542643. The next prime is 464144542681. The reversal of 464144542649 is 946245441464.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 314137830400 + 150006712249 = 560480^2 + 387307^2 .

It is a cyclic number.

It is not a de Polignac number, because 464144542649 - 2¹² = 464144538553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 464144542649.

It is not a weakly prime, because it can be changed into another prime (464144542643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 232072271324 + 232072271325.

It is an arithmetic number, because the mean of its divisors is an integer number (232072271325).

Almost surely, 2^464144542649 is an apocalyptic number.

It is an amenable number.

464144542649 is a deficient number, since it is larger than the sum of its proper divisors (1).

464144542649 is an equidigital number, since it uses as much as digits as its factorization.

464144542649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13271040, while the sum is 53.

The spelling of 464144542649 in words is "four hundred sixty-four billion, one hundred forty-four million, five hundred forty-two thousand, six hundred forty-nine".