42641857862785 has 8 divisors (see below), whose sum is σ = 51170414953320. Its totient is φ = 34113362611584.

The previous prime is 42641857862761. The next prime is 42641857862789. The reversal of 42641857862785 is 58726875814624.

It can be written as a sum of positive squares in 4 ways, for example, as 7925345409601 + 34716512453184 = 2815199^2 + 5892072^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42641857862785 - 2²⁷ = 42641723645057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42641857862789) 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 7 ways as a sum of consecutive naturals, for example, 13929022 + ... + 16712311.

It is an arithmetic number, because the mean of its divisors is an integer number (6396301869165).

Almost surely, 2^{42641857862785} is an apocalyptic number.

It is an amenable number.

42641857862785 is a deficient number, since it is larger than the sum of its proper divisors (8528557090535).

42641857862785 is a wasteful number, since it uses less digits than its factorization.

42641857862785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30919667.

The product of its digits is 1445068800, while the sum is 73.

The spelling of 42641857862785 in words is "forty-two trillion, six hundred forty-one billion, eight hundred fifty-seven million, eight hundred sixty-two thousand, seven hundred eighty-five".