655403785 has 4 divisors (see below), whose sum is σ = 786484548. Its totient is φ = 524323024.

The previous prime is 655403779. The next prime is 655403797. The reversal of 655403785 is 587304556.

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 522762496 + 132641289 = 22864^2 + 11517^2 .

It is a cyclic number.

It is not a de Polignac number, because 655403785 - 2⁷ = 655403657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65540374 + ... + 65540383.

It is an arithmetic number, because the mean of its divisors is an integer number (196621137).

Almost surely, 2^655403785 is an apocalyptic number.

It is an amenable number.

655403785 is a deficient number, since it is larger than the sum of its proper divisors (131080763).

655403785 is a wasteful number, since it uses less digits than its factorization.

655403785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131080762.

The product of its (nonzero) digits is 504000, while the sum is 43.

The square root of 655403785 is about 25600.8551614980. The cubic root of 655403785 is about 868.6329810813.

The spelling of 655403785 in words is "six hundred fifty-five million, four hundred three thousand, seven hundred eighty-five".