145446461645 has 4 divisors (see below), whose sum is σ = 174535753980. Its totient is φ = 116357169312.

The previous prime is 145446461617. The next prime is 145446461663. The reversal of 145446461645 is 546164644541.

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 70158235876 + 75288225769 = 264874^2 + 274387^2 .

It is a cyclic number.

It is not a de Polignac number, because 145446461645 - 2⁸ = 145446461389 is a prime.

It is a super-3 number, since 3×145446461645³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 145446461593 and 145446461602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14544646160 + ... + 14544646169.

It is an arithmetic number, because the mean of its divisors is an integer number (43633938495).

Almost surely, 2^145446461645 is an apocalyptic number.

It is an amenable number.

145446461645 is a deficient number, since it is larger than the sum of its proper divisors (29089292335).

145446461645 is an equidigital number, since it uses as much as digits as its factorization.

145446461645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29089292334.

The product of its digits is 5529600, while the sum is 50.

The spelling of 145446461645 in words is "one hundred forty-five billion, four hundred forty-six million, four hundred sixty-one thousand, six hundred forty-five".