655454551 has 4 divisors (see below), whose sum is σ = 667821672. Its totient is φ = 643087432.

The previous prime is 655454531. The next prime is 655454557. The reversal of 655454551 is 155454556.

655454551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 655454551 - 2¹³ = 655446359 is a prime.

It is a super-2 number, since 2×655454551² = 859241336853223202, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655454557) 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, 6183481 + ... + 6183586.

It is an arithmetic number, because the mean of its divisors is an integer number (166955418).

Almost surely, 2^655454551 is an apocalyptic number.

655454551 is a deficient number, since it is larger than the sum of its proper divisors (12367121).

655454551 is a wasteful number, since it uses less digits than its factorization.

655454551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12367120.

The product of its digits is 300000, while the sum is 40.

The square root of 655454551 is about 25601.8466326162. The cubic root of 655454551 is about 868.6554079091.

The spelling of 655454551 in words is "six hundred fifty-five million, four hundred fifty-four thousand, five hundred fifty-one".