654768851 has 4 divisors (see below), whose sum is σ = 714293304. Its totient is φ = 595244400.

The previous prime is 654768781. The next prime is 654768857. The reversal of 654768851 is 158867456.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654768851 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 654768851.

It is not an unprimeable number, because it can be changed into a prime (654768857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29762210 + ... + 29762231.

It is an arithmetic number, because the mean of its divisors is an integer number (178573326).

Almost surely, 2^654768851 is an apocalyptic number.

654768851 is a deficient number, since it is larger than the sum of its proper divisors (59524453).

654768851 is a wasteful number, since it uses less digits than its factorization.

654768851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59524452.

The product of its digits is 1612800, while the sum is 50.

The square root of 654768851 is about 25588.4515162602. The cubic root of 654768851 is about 868.3523892683.

The spelling of 654768851 in words is "six hundred fifty-four million, seven hundred sixty-eight thousand, eight hundred fifty-one".