655516731 has 8 divisors (see below), whose sum is σ = 902216704. Its totient is φ = 422913960.

The previous prime is 655516699. The next prime is 655516747. The reversal of 655516731 is 137615556.

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

It is not a de Polignac number, because 655516731 - 2⁵ = 655516699 is a prime.

It is a super-3 number, since 3×655516731³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 655516731.

It is not an unprimeable number, because it can be changed into a prime (655516231) 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, 3524191 + ... + 3524376.

It is an arithmetic number, because the mean of its divisors is an integer number (112777088).

Almost surely, 2^655516731 is an apocalyptic number.

655516731 is a deficient number, since it is larger than the sum of its proper divisors (246699973).

655516731 is a wasteful number, since it uses less digits than its factorization.

655516731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7048601.

The product of its digits is 94500, while the sum is 39.

The square root of 655516731 is about 25603.0609693451. The cubic root of 655516731 is about 868.6828755066.

The spelling of 655516731 in words is "six hundred fifty-five million, five hundred sixteen thousand, seven hundred thirty-one".