144377425881 has 36 divisors (see below), whose sum is σ = 225409830828. Its totient is φ = 88522480512.

The previous prime is 144377425847. The next prime is 144377425919. The reversal of 144377425881 is 188524773441.

144377425881 is a `hidden beast` number, since 1 + 443 + 7 + 74 + 2 + 58 + 81 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 70216520256 + 74160905625 = 264984^2 + 272325^2 .

It is not a de Polignac number, because 144377425881 - 2⁶ = 144377425817 is a prime.

It is a super-2 number, since 2×144377425881² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144377425811) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 73175611 + ... + 73177583.

Almost surely, 2^144377425881 is an apocalyptic number.

It is an amenable number.

144377425881 is a deficient number, since it is larger than the sum of its proper divisors (81032404947).

144377425881 is an equidigital number, since it uses as much as digits as its factorization.

144377425881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4282 (or 2306 counting only the distinct ones).

The product of its digits is 6021120, while the sum is 54.

The spelling of 144377425881 in words is "one hundred forty-four billion, three hundred seventy-seven million, four hundred twenty-five thousand, eight hundred eighty-one".