19711616197 has 32 divisors (see below), whose sum is σ = 25625600000. Its totient is φ = 14741818560.

The previous prime is 19711616173. The next prime is 19711616201. The reversal of 19711616197 is 79161611791.

It is not a de Polignac number, because 19711616197 - 2⁷ = 19711616069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19711616197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19711616107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40054 + ... + 202552.

It is an arithmetic number, because the mean of its divisors is an integer number (800800000).

Almost surely, 2^19711616197 is an apocalyptic number.

It is an amenable number.

19711616197 is a deficient number, since it is larger than the sum of its proper divisors (5913983803).

19711616197 is a wasteful number, since it uses less digits than its factorization.

19711616197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162593.

The product of its digits is 142884, while the sum is 49.

The spelling of 19711616197 in words is "nineteen billion, seven hundred eleven million, six hundred sixteen thousand, one hundred ninety-seven".