42645778411 has 4 divisors (see below), whose sum is σ = 42647301352. Its totient is φ = 42644255472.

The previous prime is 42645778391. The next prime is 42645778421. The reversal of 42645778411 is 11487754624.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42645778411 - 2⁷ = 42645778283 is a prime.

It is a super-2 number, since 2×42645778411² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42645778421) 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, 718665 + ... + 775738.

It is an arithmetic number, because the mean of its divisors is an integer number (10661825338).

Almost surely, 2^42645778411 is an apocalyptic number.

42645778411 is a deficient number, since it is larger than the sum of its proper divisors (1522941).

42645778411 is a wasteful number, since it uses less digits than its factorization.

42645778411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522940.

The product of its digits is 1505280, while the sum is 49.

The spelling of 42645778411 in words is "forty-two billion, six hundred forty-five million, seven hundred seventy-eight thousand, four hundred eleven".