678482121016021 has 8 divisors (see below), whose sum is σ = 802146349969920. Its totient is φ = 561502444978608.

The previous prime is 678482121016009. The next prime is 678482121016069. The reversal of 678482121016021 is 120610121284876.

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

It is not a de Polignac number, because 678482121016021 - 2¹³ = 678482121007829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678482121016321) 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, 1671138228901 + ... + 1671138229306.

It is an arithmetic number, because the mean of its divisors is an integer number (100268293746240).

Almost surely, 2^{678482121016021} is an apocalyptic number.

It is an amenable number.

678482121016021 is a deficient number, since it is larger than the sum of its proper divisors (123664228953899).

678482121016021 is a wasteful number, since it uses less digits than its factorization.

678482121016021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3342276458243.

The product of its (nonzero) digits is 516096, while the sum is 49.

The spelling of 678482121016021 in words is "six hundred seventy-eight trillion, four hundred eighty-two billion, one hundred twenty-one million, sixteen thousand, twenty-one".