609956551 has 4 divisors (see below), whose sum is σ = 617677600. Its totient is φ = 602235504.

The previous prime is 609956483. The next prime is 609956579. The reversal of 609956551 is 155659906.

It is a happy number.

609956551 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 609956551 - 2²³ = 601567943 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 (609959551) 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, 3860406 + ... + 3860563.

It is an arithmetic number, because the mean of its divisors is an integer number (154419400).

Almost surely, 2^609956551 is an apocalyptic number.

609956551 is a deficient number, since it is larger than the sum of its proper divisors (7721049).

609956551 is an equidigital number, since it uses as much as digits as its factorization.

609956551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7721048.

The product of its (nonzero) digits is 364500, while the sum is 46.

The square root of 609956551 is about 24697.2984554991. The cubic root of 609956551 is about 848.0724724277.

The spelling of 609956551 in words is "six hundred nine million, nine hundred fifty-six thousand, five hundred fifty-one".