9995661019 has 8 divisors (see below), whose sum is σ = 10233278000. Its totient is φ = 9758278656.

The previous prime is 9995661017. The next prime is 9995661047. The reversal of 9995661019 is 9101665999.

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

It is a 10-Lehmer number, since φ(9995661019) divides (9995661019-1)¹⁰.

It is a cyclic number.

It is not a de Polignac number, because 9995661019 - 2¹ = 9995661017 is a prime.

It is a super-2 number, since 2×9995661019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9995661017) 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, 29107 + ... + 144355.

It is an arithmetic number, because the mean of its divisors is an integer number (1279159750).

Almost surely, 2^9995661019 is an apocalyptic number.

9995661019 is the 57723-rd hex number.

9995661019 is a deficient number, since it is larger than the sum of its proper divisors (237616981).

9995661019 is a wasteful number, since it uses less digits than its factorization.

9995661019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117309.

The product of its (nonzero) digits is 1180980, while the sum is 55.

The square root of 9995661019 is about 99978.3027411448. The cubic root of 9995661019 is about 2154.1230432470.

The spelling of 9995661019 in words is "nine billion, nine hundred ninety-five million, six hundred sixty-one thousand, nineteen".