642655355 has 8 divisors (see below), whose sum is σ = 776816352. Its totient is φ = 510371008.

The previous prime is 642655337. The next prime is 642655417. The reversal of 642655355 is 553556246.

642655355 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 642655355 - 2¹² = 642651259 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 468407 + ... + 469776.

It is an arithmetic number, because the mean of its divisors is an integer number (97102044).

Almost surely, 2^642655355 is an apocalyptic number.

642655355 is a deficient number, since it is larger than the sum of its proper divisors (134160997).

642655355 is a wasteful number, since it uses less digits than its factorization.

642655355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938325.

The product of its digits is 540000, while the sum is 41.

The square root of 642655355 is about 25350.6480193308. The cubic root of 642655355 is about 862.9640625287.

The spelling of 642655355 in words is "six hundred forty-two million, six hundred fifty-five thousand, three hundred fifty-five".