196472890591 has 4 divisors (see below), whose sum is σ = 197678245912. Its totient is φ = 195267535272.

The previous prime is 196472890589. The next prime is 196472890597. The reversal of 196472890591 is 195098274691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 195098274691 = 37 ⋅5272926343.

It is a cyclic number.

It is not a de Polignac number, because 196472890591 - 2¹ = 196472890589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196472890597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 602677416 + ... + 602677741.

It is an arithmetic number, because the mean of its divisors is an integer number (49419561478).

Almost surely, 2^196472890591 is an apocalyptic number.

196472890591 is a deficient number, since it is larger than the sum of its proper divisors (1205355321).

196472890591 is a wasteful number, since it uses less digits than its factorization.

196472890591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205355320.

The product of its (nonzero) digits is 9797760, while the sum is 61.

The spelling of 196472890591 in words is "one hundred ninety-six billion, four hundred seventy-two million, eight hundred ninety thousand, five hundred ninety-one".