144409997805649 has 2 divisors, whose sum is σ = 144409997805650. Its totient is φ = 144409997805648.

The previous prime is 144409997805631. The next prime is 144409997805683. The reversal of 144409997805649 is 946508799904441.

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., 87346220646400 + 57063777159249 = 9345920^2 + 7554057^2 .

It is a cyclic number.

It is not a de Polignac number, because 144409997805649 - 2³³ = 144401407871057 is a prime.

It is a super-2 number, since 2×144409997805649² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (144409997805949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72204998902824 + 72204998902825.

It is an arithmetic number, because the mean of its divisors is an integer number (72204998902825).

Almost surely, 2^{144409997805649} is an apocalyptic number.

It is an amenable number.

144409997805649 is a deficient number, since it is larger than the sum of its proper divisors (1).

144409997805649 is an equidigital number, since it uses as much as digits as its factorization.

144409997805649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2821754880, while the sum is 79.

The spelling of 144409997805649 in words is "one hundred forty-four trillion, four hundred nine billion, nine hundred ninety-seven million, eight hundred five thousand, six hundred forty-nine".