146561311637 has 4 divisors (see below), whose sum is σ = 157835258700. Its totient is φ = 135287364576.

The previous prime is 146561311619. The next prime is 146561311639. The reversal of 146561311637 is 736113165641.

146561311637 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 736113165641 = 7 ⋅105159023663.

It can be written as a sum of positive squares in 2 ways, for example, as 35545069156 + 111016242481 = 188534^2 + 333191^2 .

It is not a de Polignac number, because 146561311637 - 2³⁰ = 145487569813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146561311639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5636973512 + ... + 5636973537.

It is an arithmetic number, because the mean of its divisors is an integer number (39458814675).

Almost surely, 2^146561311637 is an apocalyptic number.

It is an amenable number.

146561311637 is a deficient number, since it is larger than the sum of its proper divisors (11273947063).

146561311637 is a wasteful number, since it uses less digits than its factorization.

146561311637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11273947062.

The product of its digits is 272160, while the sum is 44.

The spelling of 146561311637 in words is "one hundred forty-six billion, five hundred sixty-one million, three hundred eleven thousand, six hundred thirty-seven".