404966920557 has 4 divisors (see below), whose sum is σ = 539955894080. Its totient is φ = 269977947036.

The previous prime is 404966920543. The next prime is 404966920583. The reversal of 404966920557 is 755029669404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 404966920557 - 2⁷ = 404966920429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 404966920497 and 404966920506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404966920507) 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, 67494486757 + ... + 67494486762.

It is an arithmetic number, because the mean of its divisors is an integer number (134988973520).

Almost surely, 2^404966920557 is an apocalyptic number.

It is an amenable number.

404966920557 is a deficient number, since it is larger than the sum of its proper divisors (134988973523).

404966920557 is a wasteful number, since it uses less digits than its factorization.

404966920557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134988973522.

The product of its (nonzero) digits is 16329600, while the sum is 57.

The spelling of 404966920557 in words is "four hundred four billion, nine hundred sixty-six million, nine hundred twenty thousand, five hundred fifty-seven".