19775159856 has 100 divisors (see below), whose sum is σ = 59208784800. Its totient is φ = 6364407168.

The previous prime is 19775159839. The next prime is 19775159869. The reversal of 19775159856 is 65895157791.

It is a junction number, because it is equal to n+sod(n) for n = 19775159793 and 19775159802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 225496 + ... + 300663.

It is an arithmetic number, because the mean of its divisors is an integer number (592087848).

Almost surely, 2^19775159856 is an apocalyptic number.

19775159856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19775159856 is an abundant number, since it is smaller than the sum of its proper divisors (39433624944).

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

19775159856 is a wasteful number, since it uses less digits than its factorization.

19775159856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526208 (or 526193 counting only the distinct ones).

The product of its digits is 23814000, while the sum is 63.

The spelling of 19775159856 in words is "nineteen billion, seven hundred seventy-five million, one hundred fifty-nine thousand, eight hundred fifty-six".