5642891778 has 16 divisors (see below), whose sum is σ = 11286519840. Its totient is φ = 1880841216.

The previous prime is 5642891759. The next prime is 5642891789. The reversal of 5642891778 is 8771982465.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163458 + ... + 194946.

It is an arithmetic number, because the mean of its divisors is an integer number (705407490).

Almost surely, 2^5642891778 is an apocalyptic number.

5642891778 is an abundant number, since it is smaller than the sum of its proper divisors (5643628062).

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

5642891778 is a wasteful number, since it uses less digits than its factorization.

5642891778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61361.

The product of its digits is 6773760, while the sum is 57.

The square root of 5642891778 is about 75119.1838214447. The cubic root of 5642891778 is about 1780.3302608591.

The spelling of 5642891778 in words is "five billion, six hundred forty-two million, eight hundred ninety-one thousand, seven hundred seventy-eight".