1056865778 has 16 divisors (see below), whose sum is σ = 1656481536. Its totient is φ = 504768000.

The previous prime is 1056865751. The next prime is 1056865787. The reversal of 1056865778 is 8775686501.

It is a super-2 number, since 2×1056865778² = 2233930545415090568, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19250 + ... + 49842.

It is an arithmetic number, because the mean of its divisors is an integer number (103530096).

Almost surely, 2^1056865778 is an apocalyptic number.

1056865778 is a deficient number, since it is larger than the sum of its proper divisors (599615758).

1056865778 is a wasteful number, since it uses less digits than its factorization.

1056865778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31369.

The product of its (nonzero) digits is 2822400, while the sum is 53.

The square root of 1056865778 is about 32509.4721273662. The cubic root of 1056865778 is about 1018.6068954371.

The spelling of 1056865778 in words is "one billion, fifty-six million, eight hundred sixty-five thousand, seven hundred seventy-eight".