8611909619 has 32 divisors (see below), whose sum is σ = 9598417920. Its totient is φ = 7689990528.

The previous prime is 8611909609. The next prime is 8611909637. The reversal of 8611909619 is 9169091168.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8611909619 is a prime.

It is a super-2 number, since 2×8611909619² (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 (8611909609) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13187897 + ... + 13188549.

It is an arithmetic number, because the mean of its divisors is an integer number (299950560).

Almost surely, 2^8611909619 is an apocalyptic number.

8611909619 is a deficient number, since it is larger than the sum of its proper divisors (986508301).

8611909619 is a wasteful number, since it uses less digits than its factorization.

8611909619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091.

The product of its (nonzero) digits is 209952, while the sum is 50.

The square root of 8611909619 is about 92800.3751016126. The cubic root of 8611909619 is about 2049.7449311042.

The spelling of 8611909619 in words is "eight billion, six hundred eleven million, nine hundred nine thousand, six hundred nineteen".