655213745 has 8 divisors (see below), whose sum is σ = 832506984. Its totient is φ = 493337344.

The previous prime is 655213739. The next prime is 655213753. The reversal of 655213745 is 547312556.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 30813601 + 624400144 = 5551^2 + 24988^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 655213745 - 2⁴ = 655213729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 655213699 and 655213708.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3854114 + ... + 3854283.

It is an arithmetic number, because the mean of its divisors is an integer number (104063373).

Almost surely, 2^655213745 is an apocalyptic number.

It is an amenable number.

655213745 is a deficient number, since it is larger than the sum of its proper divisors (177293239).

655213745 is a wasteful number, since it uses less digits than its factorization.

655213745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7708419.

The product of its digits is 126000, while the sum is 38.

The square root of 655213745 is about 25597.1432976416. The cubic root of 655213745 is about 868.5490170818.

The spelling of 655213745 in words is "six hundred fifty-five million, two hundred thirteen thousand, seven hundred forty-five".