144970721281 has 16 divisors (see below), whose sum is σ = 151856098560. Its totient is φ = 138220266240.

The previous prime is 144970721263. The next prime is 144970721309. The reversal of 144970721281 is 182127079441.

It is a cyclic number.

It is not a de Polignac number, because 144970721281 - 2¹⁹ = 144970196993 is a prime.

It is a super-2 number, since 2×144970721281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144970728281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 806446 + ... + 969688.

It is an arithmetic number, because the mean of its divisors is an integer number (9491006160).

Almost surely, 2^144970721281 is an apocalyptic number.

It is an amenable number.

144970721281 is a deficient number, since it is larger than the sum of its proper divisors (6885377279).

144970721281 is a wasteful number, since it uses less digits than its factorization.

144970721281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163656.

The product of its (nonzero) digits is 225792, while the sum is 46.

The spelling of 144970721281 in words is "one hundred forty-four billion, nine hundred seventy million, seven hundred twenty-one thousand, two hundred eighty-one".