42705349261 has 4 divisors (see below), whose sum is σ = 43429168800. Its totient is φ = 41981529724.

The previous prime is 42705349243. The next prime is 42705349277. The reversal of 42705349261 is 16294350724.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42705349261 - 2¹³ = 42705341069 is a prime.

It is a super-2 number, since 2×42705349261² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42705349231) 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, 361909681 + ... + 361909798.

It is an arithmetic number, because the mean of its divisors is an integer number (10857292200).

Almost surely, 2^42705349261 is an apocalyptic number.

It is an amenable number.

42705349261 is a deficient number, since it is larger than the sum of its proper divisors (723819539).

42705349261 is an equidigital number, since it uses as much as digits as its factorization.

42705349261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723819538.

The product of its (nonzero) digits is 362880, while the sum is 43.

Adding to 42705349261 its reverse (16294350724), we get a palindrome (58999699985).

The spelling of 42705349261 in words is "forty-two billion, seven hundred five million, three hundred forty-nine thousand, two hundred sixty-one".