5657129778 has 16 divisors (see below), whose sum is σ = 11315142720. Its totient is φ = 1885562736.

The previous prime is 5657129771. The next prime is 5657129801. The reversal of 5657129778 is 8779217565.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (5657129771) 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, 70576 + ... + 127652.

It is an arithmetic number, because the mean of its divisors is an integer number (707196420).

Almost surely, 2^5657129778 is an apocalyptic number.

5657129778 is an abundant number, since it is smaller than the sum of its proper divisors (5658012942).

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

5657129778 is a wasteful number, since it uses less digits than its factorization.

5657129778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73601.

The product of its digits is 7408800, while the sum is 57.

The square root of 5657129778 is about 75213.8935170890. The cubic root of 5657129778 is about 1781.8263644916.

The spelling of 5657129778 in words is "five billion, six hundred fifty-seven million, one hundred twenty-nine thousand, seven hundred seventy-eight".