144640700669 has 2 divisors, whose sum is σ = 144640700670. Its totient is φ = 144640700668.

The previous prime is 144640700639. The next prime is 144640700671. The reversal of 144640700669 is 966007046441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84833552644 + 59807148025 = 291262^2 + 244555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144640700669 is a prime.

It is a super-2 number, since 2×144640700669² (a number of 23 digits) contains 22 as substring.

Together with 144640700671, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144640700639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72320350334 + 72320350335.

It is an arithmetic number, because the mean of its divisors is an integer number (72320350335).

Almost surely, 2^144640700669 is an apocalyptic number.

It is an amenable number.

144640700669 is a deficient number, since it is larger than the sum of its proper divisors (1).

144640700669 is an equidigital number, since it uses as much as digits as its factorization.

144640700669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 47.

The spelling of 144640700669 in words is "one hundred forty-four billion, six hundred forty million, seven hundred thousand, six hundred sixty-nine".