145123010505533 has 4 divisors (see below), whose sum is σ = 145123043123100. Its totient is φ = 145122977887968.

The previous prime is 145123010505493. The next prime is 145123010505587. The reversal of 145123010505533 is 335505010321541.

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 87054068896729 + 58068941608804 = 9330277^2 + 7620298^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145123010505533 is a prime.

It is a super-2 number, since 2×145123010505533² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145123010505133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8335610 + ... + 18966507.

It is an arithmetic number, because the mean of its divisors is an integer number (36280760780775).

Almost surely, 2^{145123010505533} is an apocalyptic number.

It is an amenable number.

145123010505533 is a deficient number, since it is larger than the sum of its proper divisors (32617567).

145123010505533 is an equidigital number, since it uses as much as digits as its factorization.

145123010505533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32617566.

The product of its (nonzero) digits is 135000, while the sum is 38.

The spelling of 145123010505533 in words is "one hundred forty-five trillion, one hundred twenty-three billion, ten million, five hundred five thousand, five hundred thirty-three".