196515566 has 12 divisors (see below), whose sum is σ = 319192992. Its totient is φ = 90699336.

The previous prime is 196515551. The next prime is 196515569. The reversal of 196515566 is 665515691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196515569) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 290366 + ... + 291041.

It is an arithmetic number, because the mean of its divisors is an integer number (26599416).

Almost surely, 2^196515566 is an apocalyptic number.

196515566 is a deficient number, since it is larger than the sum of its proper divisors (122677426).

196515566 is a wasteful number, since it uses less digits than its factorization.

196515566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581435 (or 581422 counting only the distinct ones).

The product of its digits is 243000, while the sum is 44.

The square root of 196515566 is about 14018.4009787137. The cubic root of 196515566 is about 581.3874492689.

The spelling of 196515566 in words is "one hundred ninety-six million, five hundred fifteen thousand, five hundred sixty-six".