145317636 has 18 divisors (see below), whose sum is σ = 367330782. Its totient is φ = 48439200.

The previous prime is 145317631. The next prime is 145317647. The reversal of 145317636 is 636713541.

145317636 is a `hidden beast` number, since 1 + 4 + 5 + 3 + 17 + 636 = 666.

It can be written as a sum of positive squares in only one way, i.e., 119246400 + 26071236 = 10920^2 + 5106^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×145317636² = 42234430665256992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 4036601 = 145317636 / (1 + 4 + 5 + 3 + 1 + 7 + 6 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 145317636.

It is not an unprimeable number, because it can be changed into a prime (145317631) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2018265 + ... + 2018336.

Almost surely, 2^145317636 is an apocalyptic number.

It is an amenable number.

145317636 is an abundant number, since it is smaller than the sum of its proper divisors (222013146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145317636 is a wasteful number, since it uses less digits than its factorization.

145317636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4036611 (or 4036606 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 145317636 is about 12054.7764807150. The cubic root of 145317636 is about 525.7421232531.

The spelling of 145317636 in words is "one hundred forty-five million, three hundred seventeen thousand, six hundred thirty-six".