655216275761 has 4 divisors (see below), whose sum is σ = 659998876452. Its totient is φ = 650433675072.

The previous prime is 655216275743. The next prime is 655216275781. The reversal of 655216275761 is 167572612556.

It is a happy number.

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 328049435536 + 327166840225 = 572756^2 + 571985^2 .

It is a cyclic number.

It is not a de Polignac number, because 655216275761 - 2²² = 655212081457 is a prime.

It is a super-2 number, since 2×655216275761² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655216275731) 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, 2391300140 + ... + 2391300413.

It is an arithmetic number, because the mean of its divisors is an integer number (164999719113).

Almost surely, 2^655216275761 is an apocalyptic number.

It is an amenable number.

655216275761 is a deficient number, since it is larger than the sum of its proper divisors (4782600691).

655216275761 is a wasteful number, since it uses less digits than its factorization.

655216275761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4782600690.

The product of its digits is 5292000, while the sum is 53.

The spelling of 655216275761 in words is "six hundred fifty-five billion, two hundred sixteen million, two hundred seventy-five thousand, seven hundred sixty-one".