655650261 has 16 divisors (see below), whose sum is σ = 1110096000. Its totient is φ = 374657184.

The previous prime is 655650253. The next prime is 655650277. The reversal of 655650261 is 162056556.

It is a happy number.

It is not a de Polignac number, because 655650261 - 2³ = 655650253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655650211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1734336 + ... + 1734713.

It is an arithmetic number, because the mean of its divisors is an integer number (69381000).

Almost surely, 2^655650261 is an apocalyptic number.

It is an amenable number.

655650261 is a deficient number, since it is larger than the sum of its proper divisors (454445739).

655650261 is a wasteful number, since it uses less digits than its factorization.

655650261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3469065 (or 3469059 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 655650261 is about 25605.6685325730. The cubic root of 655650261 is about 868.7418556178.

The spelling of 655650261 in words is "six hundred fifty-five million, six hundred fifty thousand, two hundred sixty-one".