840676467421 has 8 divisors (see below), whose sum is σ = 960798199040. Its totient is φ = 720561009168.

The previous prime is 840676467383. The next prime is 840676467439. The reversal of 840676467421 is 124764676048.

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

It is not a de Polignac number, because 840676467421 - 2²¹ = 840674370269 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 (840676467451) 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, 1277586 + ... + 1820323.

It is an arithmetic number, because the mean of its divisors is an integer number (120099774880).

Almost surely, 2^840676467421 is an apocalyptic number.

It is an amenable number.

840676467421 is a deficient number, since it is larger than the sum of its proper divisors (120121731619).

840676467421 is a wasteful number, since it uses less digits than its factorization.

840676467421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3136683.

The product of its (nonzero) digits is 10838016, while the sum is 55.

The spelling of 840676467421 in words is "eight hundred forty billion, six hundred seventy-six million, four hundred sixty-seven thousand, four hundred twenty-one".