145313681581485 has 12 divisors (see below), whose sum is σ = 251877048074652. Its totient is φ = 77500630176768.

The previous prime is 145313681581423. The next prime is 145313681581499. The reversal of 145313681581485 is 584185186313541.

145313681581485 is a `hidden beast` number, since 1 + 4 + 5 + 3 + 1 + 3 + 6 + 8 + 1 + 581 + 48 + 5 = 666.

145313681581485 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 88203709572489 + 57109972008996 = 9391683^2 + 7557114^2 .

It is not a de Polignac number, because 145313681581485 - 2²² = 145313677387181 is a prime.

It is a super-2 number, since 2×145313681581485² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1614596461972 + ... + 1614596462061.

It is an arithmetic number, because the mean of its divisors is an integer number (20989754006221).

Almost surely, 2^{145313681581485} is an apocalyptic number.

145313681581485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145313681581485 is a deficient number, since it is larger than the sum of its proper divisors (106563366493167).

145313681581485 is a wasteful number, since it uses less digits than its factorization.

145313681581485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3229192924044 (or 3229192924041 counting only the distinct ones).

The product of its digits is 55296000, while the sum is 63.

The spelling of 145313681581485 in words is "one hundred forty-five trillion, three hundred thirteen billion, six hundred eighty-one million, five hundred eighty-one thousand, four hundred eighty-five".