80421281954879 has 8 divisors (see below), whose sum is σ = 81217471244832. Its totient is φ = 79625388821760.

The previous prime is 80421281954833. The next prime is 80421281954899. The reversal of 80421281954879 is 97845918212408.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80421281954879 is a prime.

It is a super-3 number, since 3×80421281954879³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80421281954899) 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, 73493402 + ... + 74579639.

It is an arithmetic number, because the mean of its divisors is an integer number (10152183905604).

Almost surely, 2^{80421281954879} is an apocalyptic number.

80421281954879 is a deficient number, since it is larger than the sum of its proper divisors (796189289953).

80421281954879 is a wasteful number, since it uses less digits than its factorization.

80421281954879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148078417.

The product of its (nonzero) digits is 92897280, while the sum is 68.

The spelling of 80421281954879 in words is "eighty trillion, four hundred twenty-one billion, two hundred eighty-one million, nine hundred fifty-four thousand, eight hundred seventy-nine".