655145005 has 4 divisors (see below), whose sum is σ = 786174012. Its totient is φ = 524116000.

The previous prime is 655144969. The next prime is 655145009. The reversal of 655145005 is 500541556.

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 438525481 + 216619524 = 20941^2 + 14718^2 .

It is not a de Polignac number, because 655145005 - 2⁷ = 655144877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655145009) 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, 65514496 + ... + 65514505.

It is an arithmetic number, because the mean of its divisors is an integer number (196543503).

Almost surely, 2^655145005 is an apocalyptic number.

It is an amenable number.

655145005 is a deficient number, since it is larger than the sum of its proper divisors (131029007).

655145005 is a wasteful number, since it uses less digits than its factorization.

655145005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131029006.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 655145005 is about 25595.8005344627. The cubic root of 655145005 is about 868.5186421861.

The spelling of 655145005 in words is "six hundred fifty-five million, one hundred forty-five thousand, five".