9985939451 has 8 divisors (see below), whose sum is σ = 10580680800. Its totient is φ = 9392012928.

The previous prime is 9985939393. The next prime is 9985939487. The reversal of 9985939451 is 1549395899.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9985939451 - 2¹⁸ = 9985677307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9985939351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178376 + ... + 227573.

It is an arithmetic number, because the mean of its divisors is an integer number (1322585100).

Almost surely, 2^9985939451 is an apocalyptic number.

9985939451 is a deficient number, since it is larger than the sum of its proper divisors (594741349).

9985939451 is a wasteful number, since it uses less digits than its factorization.

9985939451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407413.

The product of its digits is 15746400, while the sum is 62.

The square root of 9985939451 is about 99929.6725252315. The cubic root of 9985939451 is about 2153.4244652558.

The spelling of 9985939451 in words is "nine billion, nine hundred eighty-five million, nine hundred thirty-nine thousand, four hundred fifty-one".