197051518865 has 16 divisors (see below), whose sum is σ = 237049944768. Its totient is φ = 157249300416.

The previous prime is 197051518847. The next prime is 197051518871. The reversal of 197051518865 is 568815150791.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197051518865 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 197051518865.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13985114 + ... + 13999196.

It is an arithmetic number, because the mean of its divisors is an integer number (14815621548).

Almost surely, 2^197051518865 is an apocalyptic number.

It is an amenable number.

197051518865 is a deficient number, since it is larger than the sum of its proper divisors (39998425903).

197051518865 is a wasteful number, since it uses less digits than its factorization.

197051518865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20848.

The product of its (nonzero) digits is 3024000, while the sum is 56.

The spelling of 197051518865 in words is "one hundred ninety-seven billion, fifty-one million, five hundred eighteen thousand, eight hundred sixty-five".