145345146461 has 4 divisors (see below), whose sum is σ = 145368307932. Its totient is φ = 145321984992.

The previous prime is 145345146451. The next prime is 145345146509. The reversal of 145345146461 is 164641543541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 164641543541 = 271 ⋅607533371.

It can be written as a sum of positive squares in 2 ways, for example, as 111168229561 + 34176916900 = 333419^2 + 184870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145345146461 is a prime.

It is a super-2 number, since 2×145345146461² (a number of 23 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 (145345146451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11571320 + ... + 11583873.

It is an arithmetic number, because the mean of its divisors is an integer number (36342076983).

Almost surely, 2^145345146461 is an apocalyptic number.

It is an amenable number.

145345146461 is a deficient number, since it is larger than the sum of its proper divisors (23161471).

145345146461 is an equidigital number, since it uses as much as digits as its factorization.

145345146461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23161470.

The product of its digits is 691200, while the sum is 44.

The spelling of 145345146461 in words is "one hundred forty-five billion, three hundred forty-five million, one hundred forty-six thousand, four hundred sixty-one".