144766421777 has 4 divisors (see below), whose sum is σ = 146805385536. Its totient is φ = 142727458020.

The previous prime is 144766421749. The next prime is 144766421803. The reversal of 144766421777 is 777124667441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 777124667441 = 403243 ⋅1927187.

It is a cyclic number.

It is not a de Polignac number, because 144766421777 - 2⁶ = 144766421713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144766421747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1019481773 + ... + 1019481914.

It is an arithmetic number, because the mean of its divisors is an integer number (36701346384).

Almost surely, 2^144766421777 is an apocalyptic number.

It is an amenable number.

144766421777 is a deficient number, since it is larger than the sum of its proper divisors (2038963759).

144766421777 is an equidigital number, since it uses as much as digits as its factorization.

144766421777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038963758.

The product of its digits is 11063808, while the sum is 56.

The spelling of 144766421777 in words is "one hundred forty-four billion, seven hundred sixty-six million, four hundred twenty-one thousand, seven hundred seventy-seven".