145421354365405 has 8 divisors (see below), whose sum is σ = 174828186471384. Its totient is φ = 116122042670400.

The previous prime is 145421354365307. The next prime is 145421354365453. The reversal of 145421354365405 is 504563453124541.

It can be written as a sum of positive squares in 4 ways, for example, as 1896090444196 + 143525263921209 = 1376986^2 + 11980203^2 .

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

It is not a de Polignac number, because 145421354365405 - 2⁹ = 145421354364893 is a prime.

It is a super-2 number, since 2×145421354365405² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent 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, 26880099766 + ... + 26880105175.

It is an arithmetic number, because the mean of its divisors is an integer number (21853523308923).

Almost surely, 2^{145421354365405} is an apocalyptic number.

It is an amenable number.

145421354365405 is a deficient number, since it is larger than the sum of its proper divisors (29406832105979).

145421354365405 is an equidigital number, since it uses as much as digits as its factorization.

145421354365405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53760205487.

The product of its (nonzero) digits is 17280000, while the sum is 52.

The spelling of 145421354365405 in words is "one hundred forty-five trillion, four hundred twenty-one billion, three hundred fifty-four million, three hundred sixty-five thousand, four hundred five".