198712619772855 has 64 divisors (see below), whose sum is σ = 319491810570240. Its totient is φ = 105464238566400.

The previous prime is 198712619772817. The next prime is 198712619772859. The reversal of 198712619772855 is 558277916217891.

It is not a de Polignac number, because 198712619772855 - 2²⁴ = 198712602995639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198712619772859) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15642961434 + ... + 15642974136.

It is an arithmetic number, because the mean of its divisors is an integer number (4992059540160).

Almost surely, 2^{198712619772855} is an apocalyptic number.

198712619772855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

198712619772855 is a deficient number, since it is larger than the sum of its proper divisors (120779190797385).

198712619772855 is a wasteful number, since it uses less digits than its factorization.

198712619772855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19112.

The product of its digits is 1066867200, while the sum is 78.

The spelling of 198712619772855 in words is "one hundred ninety-eight trillion, seven hundred twelve billion, six hundred nineteen million, seven hundred seventy-two thousand, eight hundred fifty-five".