145544612531 has 12 divisors (see below), whose sum is σ = 151804733760. Its totient is φ = 139397287680.

The previous prime is 145544612519. The next prime is 145544612557. The reversal of 145544612531 is 135216445541.

It is not a de Polignac number, because 145544612531 - 2¹⁰ = 145544611507 is a prime.

It is a super-2 number, since 2×145544612531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145544642531) 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 11 ways as a sum of consecutive naturals, for example, 42185 + ... + 541173.

It is an arithmetic number, because the mean of its divisors is an integer number (12650394480).

Almost surely, 2^145544612531 is an apocalyptic number.

145544612531 is a deficient number, since it is larger than the sum of its proper divisors (6260121229).

145544612531 is an frugal number, since it uses more digits than its factorization.

145544612531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499214 (or 499117 counting only the distinct ones).

The product of its digits is 288000, while the sum is 41.

The spelling of 145544612531 in words is "one hundred forty-five billion, five hundred forty-four million, six hundred twelve thousand, five hundred thirty-one".