617632445 has 4 divisors (see below), whose sum is σ = 741158940. Its totient is φ = 494105952.

The previous prime is 617632403. The next prime is 617632447. The reversal of 617632445 is 544236716.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 185449924 + 432182521 = 13618^2 + 20789^2 .

It is a cyclic number.

It is not a de Polignac number, because 617632445 - 2¹⁶ = 617566909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 617632399 and 617632408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617632447) 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, 61763240 + ... + 61763249.

It is an arithmetic number, because the mean of its divisors is an integer number (185289735).

Almost surely, 2^617632445 is an apocalyptic number.

It is an amenable number.

617632445 is a deficient number, since it is larger than the sum of its proper divisors (123526495).

617632445 is a wasteful number, since it uses less digits than its factorization.

617632445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123526494.

The product of its digits is 120960, while the sum is 38.

The square root of 617632445 is about 24852.2120745820. The cubic root of 617632445 is about 851.6151274570.

The spelling of 617632445 in words is "six hundred seventeen million, six hundred thirty-two thousand, four hundred forty-five".