655390045 has 8 divisors (see below), whose sum is σ = 787141080. Its totient is φ = 523863360.

The previous prime is 655390019. The next prime is 655390049. The reversal of 655390045 is 540093556.

655390045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 421850521 + 233539524 = 20539^2 + 15282^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 655390045 - 2⁵ = 655390013 is a prime.

It is a super-2 number, since 2×655390045² = 859072222170204050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 655389986 and 655390013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655390049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49590 + ... + 61399.

It is an arithmetic number, because the mean of its divisors is an integer number (98392635).

Almost surely, 2^655390045 is an apocalyptic number.

It is an amenable number.

655390045 is a deficient number, since it is larger than the sum of its proper divisors (131751035).

655390045 is a wasteful number, since it uses less digits than its factorization.

655390045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112175.

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 655390045 is about 25600.5868096807. The cubic root of 655390045 is about 868.6269109808.

The spelling of 655390045 in words is "six hundred fifty-five million, three hundred ninety thousand, forty-five".