145550125305505 has 8 divisors (see below), whose sum is σ = 174918141730152. Its totient is φ = 116268106002048.

The previous prime is 145550125305469. The next prime is 145550125305517. The reversal of 145550125305505 is 505503521055541.

It can be written as a sum of positive squares in 4 ways, for example, as 85355554783249 + 60194570522256 = 9238807^2 + 7758516^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 145550125305505 - 2³⁹ = 145000369491617 is a prime.

It is a Duffinian 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, 21499276572 + ... + 21499283341.

It is an arithmetic number, because the mean of its divisors is an integer number (21864767716269).

Almost surely, 2^{145550125305505} is an apocalyptic number.

It is an amenable number.

145550125305505 is a deficient number, since it is larger than the sum of its proper divisors (29368016424647).

145550125305505 is an equidigital number, since it uses as much as digits as its factorization.

145550125305505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42998560595.

The product of its (nonzero) digits is 1875000, while the sum is 46.

The spelling of 145550125305505 in words is "one hundred forty-five trillion, five hundred fifty billion, one hundred twenty-five million, three hundred five thousand, five hundred five".