4278541325621 has 8 divisors (see below), whose sum is σ = 4503750367200. Its totient is φ = 4053334549680.

The previous prime is 4278541325609. The next prime is 4278541325683. The reversal of 4278541325621 is 1265231458724.

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-4278541325621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4278541325621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4278541325521) 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, 4448435 + ... + 5324063.

It is an arithmetic number, because the mean of its divisors is an integer number (562968795900).

Almost surely, 2^{4278541325621} is an apocalyptic number.

It is an amenable number.

4278541325621 is a deficient number, since it is larger than the sum of its proper divisors (225209041579).

4278541325621 is a wasteful number, since it uses less digits than its factorization.

4278541325621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132819.

The product of its digits is 3225600, while the sum is 50.

The spelling of 4278541325621 in words is "four trillion, two hundred seventy-eight billion, five hundred forty-one million, three hundred twenty-five thousand, six hundred twenty-one".