78479212021 has 8 divisors (see below), whose sum is σ = 89692977024. Its totient is φ = 67266059280.

The previous prime is 78479212003. The next prime is 78479212033. The reversal of 78479212021 is 12021297487.

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

It is not a de Polignac number, because 78479212021 - 2⁹ = 78479211509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78479212621) 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, 165936 + ... + 429526.

It is an arithmetic number, because the mean of its divisors is an integer number (11211622128).

Almost surely, 2^78479212021 is an apocalyptic number.

It is an amenable number.

78479212021 is a deficient number, since it is larger than the sum of its proper divisors (11213765003).

78479212021 is a wasteful number, since it uses less digits than its factorization.

78479212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306131.

The product of its (nonzero) digits is 112896, while the sum is 43.

The spelling of 78479212021 in words is "seventy-eight billion, four hundred seventy-nine million, two hundred twelve thousand, twenty-one".