144742978257 has 16 divisors (see below), whose sum is σ = 193296430080. Its totient is φ = 96342548432.

The previous prime is 144742978231. The next prime is 144742978277. The reversal of 144742978257 is 752879247441.

It is a cyclic number.

It is not a de Polignac number, because 144742978257 - 2¹⁴ = 144742961873 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 144742978257.

It is not an unprimeable number, because it can be changed into a prime (144742978207) 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, 5001094 + ... + 5029952.

It is an arithmetic number, because the mean of its divisors is an integer number (12081026880).

Almost surely, 2^144742978257 is an apocalyptic number.

It is an amenable number.

144742978257 is a deficient number, since it is larger than the sum of its proper divisors (48553451823).

144742978257 is a wasteful number, since it uses less digits than its factorization.

144742978257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31452.

The product of its digits is 31610880, while the sum is 60.

The spelling of 144742978257 in words is "one hundred forty-four billion, seven hundred forty-two million, nine hundred seventy-eight thousand, two hundred fifty-seven".