8149194691 has 8 divisors (see below), whose sum is σ = 8943266304. Its totient is φ = 7363995720.

The previous prime is 8149194679. The next prime is 8149194737. The reversal of 8149194691 is 1964919418.

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 8149194691 - 2¹⁹ = 8148670403 is a prime.

It is a super-2 number, since 2×8149194691² (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 (8149191691) 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, 2216235 + ... + 2219908.

It is an arithmetic number, because the mean of its divisors is an integer number (1117908288).

Almost surely, 2^8149194691 is an apocalyptic number.

8149194691 is a deficient number, since it is larger than the sum of its proper divisors (794071613).

8149194691 is a wasteful number, since it uses less digits than its factorization.

8149194691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4436321.

The product of its digits is 559872, while the sum is 52.

The square root of 8149194691 is about 90272.8901221181. The cubic root of 8149194691 is about 2012.3563934719.

The spelling of 8149194691 in words is "eight billion, one hundred forty-nine million, one hundred ninety-four thousand, six hundred ninety-one".