145215466553 has 4 divisors (see below), whose sum is σ = 145217931300. Its totient is φ = 145213001808.

The previous prime is 145215466547. The next prime is 145215466619. The reversal of 145215466553 is 355664512541.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 103447143424 + 41768323129 = 321632^2 + 204373^2 .

It is a cyclic number.

It is not a de Polignac number, because 145215466553 - 2¹⁰ = 145215465529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145215466498 and 145215466507.

It is not an unprimeable number, because it can be changed into a prime (145211466553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1141778 + ... + 1262571.

It is an arithmetic number, because the mean of its divisors is an integer number (36304482825).

Almost surely, 2^145215466553 is an apocalyptic number.

It is an amenable number.

145215466553 is a deficient number, since it is larger than the sum of its proper divisors (2464747).

145215466553 is an equidigital number, since it uses as much as digits as its factorization.

145215466553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2464746.

The product of its digits is 2160000, while the sum is 47.

The spelling of 145215466553 in words is "one hundred forty-five billion, two hundred fifteen million, four hundred sixty-six thousand, five hundred fifty-three".