42763720355561 has 4 divisors (see below), whose sum is σ = 42763733908692. Its totient is φ = 42763706802432.

The previous prime is 42763720355459. The next prime is 42763720355569. The reversal of 42763720355561 is 16555302736724.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2902743617536 + 39860976738025 = 1703744^2 + 6313555^2 .

It is a cyclic number.

It is not a de Polignac number, because 42763720355561 - 2²⁶ = 42763653246697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42763720355497 and 42763720355506.

It is not an unprimeable number, because it can be changed into a prime (42763720355569) 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, 722621 + ... + 9276293.

It is an arithmetic number, because the mean of its divisors is an integer number (10690933477173).

Almost surely, 2^{42763720355561} is an apocalyptic number.

It is an amenable number.

42763720355561 is a deficient number, since it is larger than the sum of its proper divisors (13553131).

42763720355561 is an equidigital number, since it uses as much as digits as its factorization.

42763720355561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13553130.

The product of its (nonzero) digits is 31752000, while the sum is 56.

The spelling of 42763720355561 in words is "forty-two trillion, seven hundred sixty-three billion, seven hundred twenty million, three hundred fifty-five thousand, five hundred sixty-one".