145231561005 has 16 divisors (see below), whose sum is σ = 232555095360. Its totient is φ = 77395299968.

The previous prime is 145231560997. The next prime is 145231561091. The reversal of 145231561005 is 500165132541.

It is a cyclic number.

It is not a de Polignac number, because 145231561005 - 2³ = 145231560997 is a prime.

It is a super-2 number, since 2×145231561005² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3826272 + ... + 3864041.

It is an arithmetic number, because the mean of its divisors is an integer number (14534693460).

Almost surely, 2^145231561005 is an apocalyptic number.

145231561005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145231561005 is a deficient number, since it is larger than the sum of its proper divisors (87323534355).

145231561005 is a wasteful number, since it uses less digits than its factorization.

145231561005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7691580.

The product of its (nonzero) digits is 18000, while the sum is 33.

Adding to 145231561005 its reverse (500165132541), we get a palindrome (645396693546).

The spelling of 145231561005 in words is "one hundred forty-five billion, two hundred thirty-one million, five hundred sixty-one thousand, five".