655555490 has 32 divisors (see below), whose sum is σ = 1205280000. Its totient is φ = 256643968.

The previous prime is 655555487. The next prime is 655555501. The reversal of 655555490 is 94555556.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138686 + ... + 143334.

It is an arithmetic number, because the mean of its divisors is an integer number (37665000).

Almost surely, 2^655555490 is an apocalyptic number.

655555490 is a deficient number, since it is larger than the sum of its proper divisors (549724510).

655555490 is a wasteful number, since it uses less digits than its factorization.

655555490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4954.

The product of its (nonzero) digits is 675000, while the sum is 44.

The square root of 655555490 is about 25603.8178793710. The cubic root of 655555490 is about 868.6999961558.

It can be divided in two parts, 65 and 5555490, that added together give a palindrome (5555555).

The spelling of 655555490 in words is "six hundred fifty-five million, five hundred fifty-five thousand, four hundred ninety".