5421378678 has 8 divisors (see below), whose sum is σ = 10842757368. Its totient is φ = 1807126224.

The previous prime is 5421378643. The next prime is 5421378679. The reversal of 5421378678 is 8768731245.

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

5421378678 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 5421378678.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5421378679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451781551 + ... + 451781562.

It is an arithmetic number, because the mean of its divisors is an integer number (1355344671).

Almost surely, 2^5421378678 is an apocalyptic number.

5421378678 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5421378678 is a wasteful number, since it uses less digits than its factorization.

5421378678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903563118.

The product of its digits is 2257920, while the sum is 51.

The square root of 5421378678 is about 73630.0120738819. The cubic root of 5421378678 is about 1756.7228399587.

The spelling of 5421378678 in words is "five billion, four hundred twenty-one million, three hundred seventy-eight thousand, six hundred seventy-eight".