39242590561 has 4 divisors (see below), whose sum is σ = 39983016852. Its totient is φ = 38502164272.

The previous prime is 39242590549. The next prime is 39242590567. The reversal of 39242590561 is 16509524293.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16509524293 = 131 ⋅126026903.

It can be written as a sum of positive squares in 2 ways, for example, as 23067838161 + 16174752400 = 151881^2 + 127180^2 .

It is a cyclic number.

It is not a de Polignac number, because 39242590561 - 2⁷ = 39242590433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39242590567) 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, 370213066 + ... + 370213171.

It is an arithmetic number, because the mean of its divisors is an integer number (9995754213).

Almost surely, 2^39242590561 is an apocalyptic number.

It is an amenable number.

39242590561 is a deficient number, since it is larger than the sum of its proper divisors (740426291).

39242590561 is an equidigital number, since it uses as much as digits as its factorization.

39242590561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740426290.

The product of its (nonzero) digits is 583200, while the sum is 46.

The spelling of 39242590561 in words is "thirty-nine billion, two hundred forty-two million, five hundred ninety thousand, five hundred sixty-one".