655516501 has 4 divisors (see below), whose sum is σ = 655674604. Its totient is φ = 655358400.

The previous prime is 655516489. The next prime is 655516513. The reversal of 655516501 is 105615556.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (655516489) and next prime (655516513).

It can be written as a sum of positive squares in 2 ways, for example, as 422343601 + 233172900 = 20551^2 + 15270^2 .

It is a cyclic number.

It is not a de Polignac number, because 655516501 - 2¹³ = 655508309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655516571) 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, 72660 + ... + 81181.

It is an arithmetic number, because the mean of its divisors is an integer number (163918651).

Almost surely, 2^655516501 is an apocalyptic number.

It is an amenable number.

655516501 is a deficient number, since it is larger than the sum of its proper divisors (158103).

655516501 is a wasteful number, since it uses less digits than its factorization.

655516501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158102.

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 655516501 is about 25603.0564776942. The cubic root of 655516501 is about 868.6827739088.

The spelling of 655516501 in words is "six hundred fifty-five million, five hundred sixteen thousand, five hundred one".