196721564 has 24 divisors (see below), whose sum is σ = 371131488. Its totient is φ = 90699840.

The previous prime is 196721549. The next prime is 196721593. The reversal of 196721564 is 465127691.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83969 + ... + 86279.

It is an arithmetic number, because the mean of its divisors is an integer number (15463812).

Almost surely, 2^196721564 is an apocalyptic number.

It is an amenable number.

196721564 is a deficient number, since it is larger than the sum of its proper divisors (174409924).

196721564 is a wasteful number, since it uses less digits than its factorization.

196721564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3965 (or 3963 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The square root of 196721564 is about 14025.7464685485. The cubic root of 196721564 is about 581.5905253419.

The spelling of 196721564 in words is "one hundred ninety-six million, seven hundred twenty-one thousand, five hundred sixty-four".