6535220655 has 16 divisors (see below), whose sum is σ = 10559883744. Its totient is φ = 3450940800.

The previous prime is 6535220623. The next prime is 6535220687. The reversal of 6535220655 is 5560225356.

It is an interprime number because it is at equal distance from previous prime (6535220623) and next prime (6535220687).

It is not a de Polignac number, because 6535220655 - 2⁵ = 6535220623 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2155324 + ... + 2158353.

It is an arithmetic number, because the mean of its divisors is an integer number (659992734).

Almost surely, 2^6535220655 is an apocalyptic number.

6535220655 is a deficient number, since it is larger than the sum of its proper divisors (4024663089).

6535220655 is a wasteful number, since it uses less digits than its factorization.

6535220655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4313786.

The product of its (nonzero) digits is 270000, while the sum is 39.

The square root of 6535220655 is about 80840.7116185898. The cubic root of 6535220655 is about 1869.6203157384.

The spelling of 6535220655 in words is "six billion, five hundred thirty-five million, two hundred twenty thousand, six hundred fifty-five".