9945555499 has 8 divisors (see below), whose sum is σ = 10850495040. Its totient is φ = 9040749000.

The previous prime is 9945555497. The next prime is 9945555533.

9945555499 is nontrivially palindromic in base 10.

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 9945555499 - 2¹ = 9945555497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9945555499.

It is not an unprimeable number, because it can be changed into a prime (9945555493) 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, 185832 + ... + 233290.

It is an arithmetic number, because the mean of its divisors is an integer number (1356311880).

Almost surely, 2^9945555499 is an apocalyptic number.

9945555499 is a deficient number, since it is larger than the sum of its proper divisors (904939541).

9945555499 is a wasteful number, since it uses less digits than its factorization.

9945555499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66521.

The product of its digits is 65610000, while the sum is 64.

The square root of 9945555499 is about 99727.4059574398. The cubic root of 9945555499 is about 2150.5176686775.

The spelling of 9945555499 in words is "nine billion, nine hundred forty-five million, five hundred fifty-five thousand, four hundred ninety-nine".