9885781494 has 12 divisors (see below), whose sum is σ = 21419193276. Its totient is φ = 3295260492.

The previous prime is 9885781463. The next prime is 9885781513. The reversal of 9885781494 is 4941875889.

9885781494 is a `hidden beast` number, since 98 + 8 + 57 + 8 + 1 + 494 = 666.

It is a super-2 number, since 2×9885781494² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 274605024 + ... + 274605059.

It is an arithmetic number, because the mean of its divisors is an integer number (1784932773).

Almost surely, 2^9885781494 is an apocalyptic number.

9885781494 is an abundant number, since it is smaller than the sum of its proper divisors (11533411782).

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

9885781494 is a wasteful number, since it uses less digits than its factorization.

9885781494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549210091 (or 549210088 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 63.

The square root of 9885781494 is about 99427.2673565959. The cubic root of 9885781494 is about 2146.2007172162.

The spelling of 9885781494 in words is "nine billion, eight hundred eighty-five million, seven hundred eighty-one thousand, four hundred ninety-four".