42111391037761 has 4 divisors (see below), whose sum is σ = 42112247131332. Its totient is φ = 42110534944192.

The previous prime is 42111391037741. The next prime is 42111391037797. The reversal of 42111391037761 is 16773019311124.

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 27027729392400 + 15083661645361 = 5198820^2 + 3883769^2 .

It is a cyclic number.

It is not a de Polignac number, because 42111391037761 - 2⁷ = 42111391037633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42111391037741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 427972996 + ... + 428071381.

It is an arithmetic number, because the mean of its divisors is an integer number (10528061782833).

Almost surely, 2^{42111391037761} is an apocalyptic number.

It is an amenable number.

42111391037761 is a deficient number, since it is larger than the sum of its proper divisors (856093571).

42111391037761 is an equidigital number, since it uses as much as digits as its factorization.

42111391037761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856093570.

The product of its (nonzero) digits is 190512, while the sum is 46.

The spelling of 42111391037761 in words is "forty-two trillion, one hundred eleven billion, three hundred ninety-one million, thirty-seven thousand, seven hundred sixty-one".