655855901 has 4 divisors (see below), whose sum is σ = 657225600. Its totient is φ = 654486204.

The previous prime is 655855883. The next prime is 655855931. The reversal of 655855901 is 109558556.

655855901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 655855901 - 2¹⁴ = 655839517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655855931) 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, 684131 + ... + 685088.

It is an arithmetic number, because the mean of its divisors is an integer number (164306400).

Almost surely, 2^655855901 is an apocalyptic number.

It is an amenable number.

655855901 is a deficient number, since it is larger than the sum of its proper divisors (1369699).

655855901 is a wasteful number, since it uses less digits than its factorization.

655855901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369698.

The product of its (nonzero) digits is 270000, while the sum is 44.

The square root of 655855901 is about 25609.6837348687. The cubic root of 655855901 is about 868.8326710072.

The spelling of 655855901 in words is "six hundred fifty-five million, eight hundred fifty-five thousand, nine hundred one".