42595770661 has 2 divisors, whose sum is σ = 42595770662. Its totient is φ = 42595770660.

The previous prime is 42595770653. The next prime is 42595770677. The reversal of 42595770661 is 16607759524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29369390625 + 13226380036 = 171375^2 + 115006^2 .

It is a cyclic number.

It is not a de Polignac number, because 42595770661 - 2³ = 42595770653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42595770599 and 42595770608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42595770461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21297885330 + 21297885331.

It is an arithmetic number, because the mean of its divisors is an integer number (21297885331).

Almost surely, 2^42595770661 is an apocalyptic number.

It is an amenable number.

42595770661 is a deficient number, since it is larger than the sum of its proper divisors (1).

42595770661 is an equidigital number, since it uses as much as digits as its factorization.

42595770661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3175200, while the sum is 52.

The spelling of 42595770661 in words is "forty-two billion, five hundred ninety-five million, seven hundred seventy thousand, six hundred sixty-one".