196188432551 has 4 divisors (see below), whose sum is σ = 196190253912. Its totient is φ = 196186611192.

The previous prime is 196188432521. The next prime is 196188432581. The reversal of 196188432551 is 155234881691.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (196188432521) and next prime (196188432581).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196188432551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 196188432493 and 196188432502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196188432521) 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, 738221 + ... + 968166.

It is an arithmetic number, because the mean of its divisors is an integer number (49047563478).

Almost surely, 2^196188432551 is an apocalyptic number.

196188432551 is a deficient number, since it is larger than the sum of its proper divisors (1821361).

196188432551 is a wasteful number, since it uses less digits than its factorization.

196188432551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821360.

The product of its digits is 2073600, while the sum is 53.

The spelling of 196188432551 in words is "one hundred ninety-six billion, one hundred eighty-eight million, four hundred thirty-two thousand, five hundred fifty-one".