144491557797 has 6 divisors (see below), whose sum is σ = 208710027942. Its totient is φ = 96327705192.

The previous prime is 144491557741. The next prime is 144491557807. The reversal of 144491557797 is 797755194441.

It is a happy number.

144491557797 is a `hidden beast` number, since 1 + 4 + 4 + 4 + 9 + 1 + 557 + 79 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 134402158881 + 10089398916 = 366609^2 + 100446^2 .

It is not a de Polignac number, because 144491557797 - 2⁸ = 144491557541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144491557997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8027308758 + ... + 8027308775.

It is an arithmetic number, because the mean of its divisors is an integer number (34785004657).

Almost surely, 2^144491557797 is an apocalyptic number.

It is an amenable number.

144491557797 is a deficient number, since it is larger than the sum of its proper divisors (64218470145).

144491557797 is a wasteful number, since it uses less digits than its factorization.

144491557797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16054617539 (or 16054617536 counting only the distinct ones).

The product of its digits is 44452800, while the sum is 63.

The spelling of 144491557797 in words is "one hundred forty-four billion, four hundred ninety-one million, five hundred fifty-seven thousand, seven hundred ninety-seven".