6520253655 has 16 divisors (see below), whose sum is σ = 10981480320. Its totient is φ = 3294443808.

The previous prime is 6520253633. The next prime is 6520253687. The reversal of 6520253655 is 5563520256.

It is not a de Polignac number, because 6520253655 - 2⁷ = 6520253527 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, 11438757 + ... + 11439326.

It is an arithmetic number, because the mean of its divisors is an integer number (686342520).

Almost surely, 2^6520253655 is an apocalyptic number.

6520253655 is a deficient number, since it is larger than the sum of its proper divisors (4461226665).

6520253655 is a wasteful number, since it uses less digits than its factorization.

6520253655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22878110.

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

The square root of 6520253655 is about 80748.0876244137. The cubic root of 6520253655 is about 1868.1919530280.

The spelling of 6520253655 in words is "six billion, five hundred twenty million, two hundred fifty-three thousand, six hundred fifty-five".