655369690 has 16 divisors (see below), whose sum is σ = 1180839240. Its totient is φ = 261887040.

The previous prime is 655369661. The next prime is 655369697. The reversal of 655369690 is 96963556.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 586463089 + 68906601 = 24217^2 + 8301^2 .

It is a super-2 number, since 2×655369690² = 859018861141392200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (655369697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21885 + ... + 42304.

Almost surely, 2^655369690 is an apocalyptic number.

655369690 is a deficient number, since it is larger than the sum of its proper divisors (525469550).

655369690 is a wasteful number, since it uses less digits than its factorization.

655369690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65217.

The product of its (nonzero) digits is 1312200, while the sum is 49.

The square root of 655369690 is about 25600.1892571129. The cubic root of 655369690 is about 868.6179183288.

The spelling of 655369690 in words is "six hundred fifty-five million, three hundred sixty-nine thousand, six hundred ninety".