78430617221 has 8 divisors (see below), whose sum is σ = 85698904800. Its totient is φ = 71185368240.

The previous prime is 78430617193. The next prime is 78430617233. The reversal of 78430617221 is 12271603487.

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 78430617221 - 2²² = 78426422917 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 (78430617271) 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, 5752526 + ... + 5766143.

It is an arithmetic number, because the mean of its divisors is an integer number (10712363100).

Almost surely, 2^78430617221 is an apocalyptic number.

It is an amenable number.

78430617221 is a deficient number, since it is larger than the sum of its proper divisors (7268287579).

78430617221 is a wasteful number, since it uses less digits than its factorization.

78430617221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11519299.

The product of its (nonzero) digits is 112896, while the sum is 41.

The spelling of 78430617221 in words is "seventy-eight billion, four hundred thirty million, six hundred seventeen thousand, two hundred twenty-one".