144735407521 has 4 divisors (see below), whose sum is σ = 146895637552. Its totient is φ = 142575177492.

The previous prime is 144735407497. The next prime is 144735407581. The reversal of 144735407521 is 125704537441.

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: 125704537441 = 7 ⋅17957791063.

It is a cyclic number.

It is not a de Polignac number, because 144735407521 - 2¹⁵ = 144735374753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144735407581) 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, 1080114915 + ... + 1080115048.

It is an arithmetic number, because the mean of its divisors is an integer number (36723909388).

Almost surely, 2^144735407521 is an apocalyptic number.

It is an amenable number.

144735407521 is a deficient number, since it is larger than the sum of its proper divisors (2160230031).

144735407521 is an equidigital number, since it uses as much as digits as its factorization.

144735407521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2160230030.

The product of its (nonzero) digits is 470400, while the sum is 43.

The spelling of 144735407521 in words is "one hundred forty-four billion, seven hundred thirty-five million, four hundred seven thousand, five hundred twenty-one".