19413061665 has 8 divisors (see below), whose sum is σ = 31060898688. Its totient is φ = 10353632880.

The previous prime is 19413061609. The next prime is 19413061667. The reversal of 19413061665 is 56616031491.

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

It is not a de Polignac number, because 19413061665 - 2⁷ = 19413061537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19413061667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 647102041 + ... + 647102070.

It is an arithmetic number, because the mean of its divisors is an integer number (3882612336).

Almost surely, 2^19413061665 is an apocalyptic number.

19413061665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19413061665 is a deficient number, since it is larger than the sum of its proper divisors (11647837023).

19413061665 is a wasteful number, since it uses less digits than its factorization.

19413061665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294204119.

The product of its (nonzero) digits is 116640, while the sum is 42.

The spelling of 19413061665 in words is "nineteen billion, four hundred thirteen million, sixty-one thousand, six hundred sixty-five".