42506211577 has 4 divisors (see below), whose sum is σ = 42515936100. Its totient is φ = 42496487056.

The previous prime is 42506211563. The next prime is 42506211619. The reversal of 42506211577 is 77511260524.

42506211577 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 16388096256 + 26118115321 = 128016^2 + 161611^2 .

It is a cyclic number.

It is not a de Polignac number, because 42506211577 - 2¹⁵ = 42506178809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42506211877) 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, 4855702 + ... + 4864447.

It is an arithmetic number, because the mean of its divisors is an integer number (10628984025).

Almost surely, 2^42506211577 is an apocalyptic number.

It is an amenable number.

42506211577 is a deficient number, since it is larger than the sum of its proper divisors (9724523).

42506211577 is an equidigital number, since it uses as much as digits as its factorization.

42506211577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9724522.

The product of its (nonzero) digits is 117600, while the sum is 40.

The spelling of 42506211577 in words is "forty-two billion, five hundred six million, two hundred eleven thousand, five hundred seventy-seven".