613778605 has 8 divisors (see below), whose sum is σ = 803492064. Its totient is φ = 446384400.

The previous prime is 613778573. The next prime is 613778611. The reversal of 613778605 is 506877316.

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

It is not a de Polignac number, because 613778605 - 2⁵ = 613778573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5579751 + ... + 5579860.

It is an arithmetic number, because the mean of its divisors is an integer number (100436508).

Almost surely, 2^613778605 is an apocalyptic number.

It is an amenable number.

613778605 is a deficient number, since it is larger than the sum of its proper divisors (189713459).

613778605 is a wasteful number, since it uses less digits than its factorization.

613778605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11159627.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 613778605 is about 24774.5555964179. Note that the first 4 decimals coincide. The cubic root of 613778605 is about 849.8401567944.

The spelling of 613778605 in words is "six hundred thirteen million, seven hundred seventy-eight thousand, six hundred five".