655273961 has 8 divisors (see below), whose sum is σ = 669743424. Its totient is φ = 640961200.

The previous prime is 655273909. The next prime is 655273967. The reversal of 655273961 is 169372556.

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

It is a cyclic number.

It is not a de Polignac number, because 655273961 - 2¹⁸ = 655011817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655273967) 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, 30701 + ... + 47466.

It is an arithmetic number, because the mean of its divisors is an integer number (83717928).

Almost surely, 2^655273961 is an apocalyptic number.

It is an amenable number.

655273961 is a deficient number, since it is larger than the sum of its proper divisors (14469463).

655273961 is a wasteful number, since it uses less digits than its factorization.

655273961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78351.

The product of its digits is 340200, while the sum is 44.

The square root of 655273961 is about 25598.3194956231. The cubic root of 655273961 is about 868.5756236388.

The spelling of 655273961 in words is "six hundred fifty-five million, two hundred seventy-three thousand, nine hundred sixty-one".