42699579617 has 4 divisors (see below), whose sum is σ = 42740285700. Its totient is φ = 42658873536.

The previous prime is 42699579607. The next prime is 42699579619. The reversal of 42699579617 is 71697599624.

42699579617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 19310159521 + 23389420096 = 138961^2 + 152936^2 .

It is a cyclic number.

It is not a de Polignac number, because 42699579617 - 2³² = 38404612321 is a prime.

It is a super-3 number, since 3×42699579617³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42699579619) 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, 20351468 + ... + 20353565.

It is an arithmetic number, because the mean of its divisors is an integer number (10685071425).

Almost surely, 2^42699579617 is an apocalyptic number.

It is an amenable number.

42699579617 is a deficient number, since it is larger than the sum of its proper divisors (40706083).

42699579617 is a wasteful number, since it uses less digits than its factorization.

42699579617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40706082.

The product of its digits is 51438240, while the sum is 65.

The spelling of 42699579617 in words is "forty-two billion, six hundred ninety-nine million, five hundred seventy-nine thousand, six hundred seventeen".