19117055257 has 8 divisors (see below), whose sum is σ = 20126964960. Its totient is φ = 18107520480.

The previous prime is 19117055233. The next prime is 19117055303. The reversal of 19117055257 is 75255071191.

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 19117055257 - 2²³ = 19108666649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19117055207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14133 + ... + 196045.

It is an arithmetic number, because the mean of its divisors is an integer number (2515870620).

Almost surely, 2^19117055257 is an apocalyptic number.

It is an amenable number.

19117055257 is a deficient number, since it is larger than the sum of its proper divisors (1009909703).

19117055257 is a wasteful number, since it uses less digits than its factorization.

19117055257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187463.

The product of its (nonzero) digits is 110250, while the sum is 43.

The spelling of 19117055257 in words is "nineteen billion, one hundred seventeen million, fifty-five thousand, two hundred fifty-seven".