84126743821 has 8 divisors (see below), whose sum is σ = 88586971200. Its totient is φ = 79669766880.

The previous prime is 84126743807. The next prime is 84126743849. The reversal of 84126743821 is 12834762148.

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 84126743821 - 2¹³ = 84126735629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84126747821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 759385 + ... + 863086.

It is an arithmetic number, because the mean of its divisors is an integer number (11073371400).

Almost surely, 2^84126743821 is an apocalyptic number.

It is an amenable number.

84126743821 is a deficient number, since it is larger than the sum of its proper divisors (4460227379).

84126743821 is a wasteful number, since it uses less digits than its factorization.

84126743821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1625219.

The product of its digits is 516096, while the sum is 46.

The spelling of 84126743821 in words is "eighty-four billion, one hundred twenty-six million, seven hundred forty-three thousand, eight hundred twenty-one".