654857155 has 4 divisors (see below), whose sum is σ = 785828592. Its totient is φ = 523885720.

The previous prime is 654857141. The next prime is 654857179. The reversal of 654857155 is 551758456.

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

It is not a de Polignac number, because 654857155 - 2¹¹ = 654855107 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 65485711 + ... + 65485720.

It is an arithmetic number, because the mean of its divisors is an integer number (196457148).

Almost surely, 2^654857155 is an apocalyptic number.

654857155 is a deficient number, since it is larger than the sum of its proper divisors (130971437).

654857155 is a wasteful number, since it uses less digits than its factorization.

654857155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130971436.

The product of its digits is 840000, while the sum is 46.

The square root of 654857155 is about 25590.1769239683. The cubic root of 654857155 is about 868.3914236759.

The spelling of 654857155 in words is "six hundred fifty-four million, eight hundred fifty-seven thousand, one hundred fifty-five".