655055511 has 16 divisors (see below), whose sum is σ = 978561408. Its totient is φ = 386272800.

The previous prime is 655055503. The next prime is 655055519. The reversal of 655055511 is 115550556.

It is an interprime number because it is at equal distance from previous prime (655055503) and next prime (655055519).

It is not a de Polignac number, because 655055511 - 2³ = 655055503 is a prime.

It is a super-2 number, since 2×655055511² = 858195444982942242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655055519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267025 + ... + 269466.

It is an arithmetic number, because the mean of its divisors is an integer number (61160088).

Almost surely, 2^655055511 is an apocalyptic number.

655055511 is a deficient number, since it is larger than the sum of its proper divisors (323505897).

655055511 is a wasteful number, since it uses less digits than its factorization.

655055511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536542.

The product of its (nonzero) digits is 18750, while the sum is 33.

The square root of 655055511 is about 25594.0522582884. The cubic root of 655055511 is about 868.4790933095.

The spelling of 655055511 in words is "six hundred fifty-five million, fifty-five thousand, five hundred eleven".