145187603217 has 6 divisors (see below), whose sum is σ = 209715426882. Its totient is φ = 96791735472.

The previous prime is 145187603203. The next prime is 145187603269. The reversal of 145187603217 is 712306781541.

145187603217 is a `hidden beast` number, since 1 + 4 + 5 + 18 + 7 + 603 + 21 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 143549296641 + 1638306576 = 378879^2 + 40476^2 .

It is not a de Polignac number, because 145187603217 - 2²² = 145183408913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145187603287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8065977948 + ... + 8065977965.

It is an arithmetic number, because the mean of its divisors is an integer number (34952571147).

Almost surely, 2^145187603217 is an apocalyptic number.

It is an amenable number.

145187603217 is a deficient number, since it is larger than the sum of its proper divisors (64527823665).

145187603217 is a wasteful number, since it uses less digits than its factorization.

145187603217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16131955919 (or 16131955916 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 145187603217 in words is "one hundred forty-five billion, one hundred eighty-seven million, six hundred three thousand, two hundred seventeen".