605099691457 has 4 divisors (see below), whose sum is σ = 605139851140. Its totient is φ = 605059531776.

The previous prime is 605099691409. The next prime is 605099691461. The reversal of 605099691457 is 754196990506.

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 271367023041 + 333732668416 = 520929^2 + 577696^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-605099691457 is a prime.

It is a super-2 number, since 2×605099691457² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 605099691395 and 605099691404.

It is not an unprimeable number, because it can be changed into a prime (605099691467) 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, 20057232 + ... + 20087377.

It is an arithmetic number, because the mean of its divisors is an integer number (151284962785).

Almost surely, 2^605099691457 is an apocalyptic number.

It is an amenable number.

605099691457 is a deficient number, since it is larger than the sum of its proper divisors (40159683).

605099691457 is a wasteful number, since it uses less digits than its factorization.

605099691457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40159682.

The product of its (nonzero) digits is 18370800, while the sum is 61.

The spelling of 605099691457 in words is "six hundred five billion, ninety-nine million, six hundred ninety-one thousand, four hundred fifty-seven".