858404554649 has 4 divisors (see below), whose sum is σ = 862852246836. Its totient is φ = 853956862464.

The previous prime is 858404554643. The next prime is 858404554687. The reversal of 858404554649 is 946455404858.

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

It can be written as a sum of positive squares in 2 ways, for example, as 67537614400 + 790866940249 = 259880^2 + 889307^2 .

It is a cyclic number.

It is not a de Polignac number, because 858404554649 - 2⁸ = 858404554393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 858404554591 and 858404554600.

It is not an unprimeable number, because it can be changed into a prime (858404554643) 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, 2223845804 + ... + 2223846189.

It is an arithmetic number, because the mean of its divisors is an integer number (215713061709).

Almost surely, 2^858404554649 is an apocalyptic number.

It is an amenable number.

858404554649 is a deficient number, since it is larger than the sum of its proper divisors (4447692187).

858404554649 is a wasteful number, since it uses less digits than its factorization.

858404554649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4447692186.

The product of its (nonzero) digits is 110592000, while the sum is 62.

The spelling of 858404554649 in words is "eight hundred fifty-eight billion, four hundred four million, five hundred fifty-four thousand, six hundred forty-nine".