5401668078 has 24 divisors (see below), whose sum is σ = 11710569000. Its totient is φ = 1799486064.

The previous prime is 5401668071. The next prime is 5401668079. The reversal of 5401668078 is 8708661045.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5401668071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57733 + ... + 118896.

It is an arithmetic number, because the mean of its divisors is an integer number (487940375).

Almost surely, 2^5401668078 is an apocalyptic number.

5401668078 is an abundant number, since it is smaller than the sum of its proper divisors (6308900922).

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

5401668078 is a wasteful number, since it uses less digits than its factorization.

5401668078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178336 (or 178333 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 5401668078 is about 73496.0412403280. The cubic root of 5401668078 is about 1754.5912720952.

The spelling of 5401668078 in words is "five billion, four hundred one million, six hundred sixty-eight thousand, seventy-eight".