145133535561 has 24 divisors (see below), whose sum is σ = 225135738144. Its totient is φ = 82922152320.

The previous prime is 145133535553. The next prime is 145133535637. The reversal of 145133535561 is 165535331541.

It is not a de Polignac number, because 145133535561 - 2³ = 145133535553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145133535511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1082226 + ... + 1208916.

It is an arithmetic number, because the mean of its divisors is an integer number (9380655756).

Almost surely, 2^145133535561 is an apocalyptic number.

It is an amenable number.

145133535561 is a deficient number, since it is larger than the sum of its proper divisors (80002202583).

145133535561 is a wasteful number, since it uses less digits than its factorization.

145133535561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134501 (or 134494 counting only the distinct ones).

The product of its digits is 405000, while the sum is 42.

The spelling of 145133535561 in words is "one hundred forty-five billion, one hundred thirty-three million, five hundred thirty-five thousand, five hundred sixty-one".