655655101 has 4 divisors (see below), whose sum is σ = 655843804. Its totient is φ = 655466400.

The previous prime is 655655093. The next prime is 655655129. The reversal of 655655101 is 101556556.

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 242549476 + 413105625 = 15574^2 + 20325^2 .

It is a cyclic number.

It is not a de Polignac number, because 655655101 - 2³ = 655655093 is a prime.

It is a super-2 number, since 2×655655101² = 859767222934640402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655655191) 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 3 ways as a sum of consecutive naturals, for example, 89040 + ... + 96121.

It is an arithmetic number, because the mean of its divisors is an integer number (163960951).

Almost surely, 2^655655101 is an apocalyptic number.

It is an amenable number.

655655101 is a deficient number, since it is larger than the sum of its proper divisors (188703).

655655101 is a wasteful number, since it uses less digits than its factorization.

655655101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188702.

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 655655101 is about 25605.7630427215. The cubic root of 655655101 is about 868.7439932921.

The spelling of 655655101 in words is "six hundred fifty-five million, six hundred fifty-five thousand, one hundred one".