144778407511145 has 8 divisors (see below), whose sum is σ = 173776165591560. Its totient is φ = 115794674956800.

The previous prime is 144778407511139. The next prime is 144778407511207. The reversal of 144778407511145 is 541115704877441.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 42907255431769 + 101871152079376 = 6550363^2 + 10093124^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 144778407511145 - 2⁴² = 140380361000041 is a prime.

It is a super-2 number, since 2×144778407511145² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3506358806 + ... + 3506400095.

It is an arithmetic number, because the mean of its divisors is an integer number (21722020698945).

Almost surely, 2^{144778407511145} is an apocalyptic number.

It is an amenable number.

144778407511145 is a deficient number, since it is larger than the sum of its proper divisors (28997758080415).

144778407511145 is an equidigital number, since it uses as much as digits as its factorization.

144778407511145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7012763035.

The product of its (nonzero) digits is 17561600, while the sum is 59.

The spelling of 144778407511145 in words is "one hundred forty-four trillion, seven hundred seventy-eight billion, four hundred seven million, five hundred eleven thousand, one hundred forty-five".