655111961 has 8 divisors (see below), whose sum is σ = 751257024. Its totient is φ = 559606320.

The previous prime is 655111939. The next prime is 655111969. The reversal of 655111961 is 169111556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 655111961 - 2¹⁸ = 654849817 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (655111969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157655 + ... + 161756.

It is an arithmetic number, because the mean of its divisors is an integer number (93907128).

Almost surely, 2^655111961 is an apocalyptic number.

It is an amenable number.

655111961 is a deficient number, since it is larger than the sum of its proper divisors (96145063).

655111961 is a wasteful number, since it uses less digits than its factorization.

655111961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319711.

The product of its digits is 8100, while the sum is 35.

The square root of 655111961 is about 25595.1550298098. The cubic root of 655111961 is about 868.5040399162.

The spelling of 655111961 in words is "six hundred fifty-five million, one hundred eleven thousand, nine hundred sixty-one".