404019561497 has 4 divisors (see below), whose sum is σ = 404330108196. Its totient is φ = 403709014800.

The previous prime is 404019561481. The next prime is 404019561509. The reversal of 404019561497 is 794165910404.

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 127531837456 + 276487724041 = 357116^2 + 525821^2 .

It is a cyclic number.

It is not a de Polignac number, because 404019561497 - 2⁴ = 404019561481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404019561457) 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, 155271398 + ... + 155273999.

It is an arithmetic number, because the mean of its divisors is an integer number (101082527049).

Almost surely, 2^404019561497 is an apocalyptic number.

It is an amenable number.

404019561497 is a deficient number, since it is larger than the sum of its proper divisors (310546699).

404019561497 is a wasteful number, since it uses less digits than its factorization.

404019561497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310546698.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 404019561497 in words is "four hundred four billion, nineteen million, five hundred sixty-one thousand, four hundred ninety-seven".