19555252466 has 16 divisors (see below), whose sum is σ = 30887524800. Its totient is φ = 9259771248.

The previous prime is 19555252429. The next prime is 19555252553. The reversal of 19555252466 is 66425255591.

It is a Curzon 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, 21680 + ... + 198948.

It is an arithmetic number, because the mean of its divisors is an integer number (1930470300).

Almost surely, 2^19555252466 is an apocalyptic number.

19555252466 is a deficient number, since it is larger than the sum of its proper divisors (11332272334).

19555252466 is a wasteful number, since it uses less digits than its factorization.

19555252466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180193.

The product of its digits is 3240000, while the sum is 50.

The spelling of 19555252466 in words is "nineteen billion, five hundred fifty-five million, two hundred fifty-two thousand, four hundred sixty-six".