5571712778 has 8 divisors (see below), whose sum is σ = 8362768260. Its totient is φ = 2784123360.

The previous prime is 5571712771. The next prime is 5571712789. The reversal of 5571712778 is 8772171755.

It can be written as a sum of positive squares in 2 ways, for example, as 4755067849 + 816644929 = 68957^2 + 28577^2 .

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

It is not an unprimeable number, because it can be changed into a prime (5571712771) 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, 862493 + ... + 868928.

Almost surely, 2^5571712778 is an apocalyptic number.

5571712778 is a deficient number, since it is larger than the sum of its proper divisors (2791055482).

5571712778 is a wasteful number, since it uses less digits than its factorization.

5571712778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733032.

The product of its digits is 960400, while the sum is 50.

The square root of 5571712778 is about 74643.9065028084. The cubic root of 5571712778 is about 1772.8129145976.

The spelling of 5571712778 in words is "five billion, five hundred seventy-one million, seven hundred twelve thousand, seven hundred seventy-eight".