803561855640 has 32 divisors (see below), whose sum is σ = 2410685567280. Its totient is φ = 214283161472.

The previous prime is 803561855623. The next prime is 803561855641. The reversal of 803561855640 is 46558165308.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (803561855641) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3348174279 + ... + 3348174518.

Almost surely, 2^803561855640 is an apocalyptic number.

It is an amenable number.

803561855640 is an abundant number, since it is smaller than the sum of its proper divisors (1607123711640).

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

803561855640 is a wasteful number, since it uses less digits than its factorization.

803561855640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6696348811 (or 6696348807 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 51.

The spelling of 803561855640 in words is "eight hundred three billion, five hundred sixty-one million, eight hundred fifty-five thousand, six hundred forty".