19440099155 has 8 divisors (see below), whose sum is σ = 23332130352. Its totient is φ = 15549405088.

The previous prime is 19440099139. The next prime is 19440099179. The reversal of 19440099155 is 55199004491.

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 19440099155 - 2⁴ = 19440099139 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302012 + ... + 360681.

It is an arithmetic number, because the mean of its divisors is an integer number (2916516294).

Almost surely, 2^19440099155 is an apocalyptic number.

19440099155 is a deficient number, since it is larger than the sum of its proper divisors (3892031197).

19440099155 is an equidigital number, since it uses as much as digits as its factorization.

19440099155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668565.

The product of its (nonzero) digits is 291600, while the sum is 47.

The spelling of 19440099155 in words is "nineteen billion, four hundred forty million, ninety-nine thousand, one hundred fifty-five".