190961671541 has 4 divisors (see below), whose sum is σ = 190963209132. Its totient is φ = 190960133952.

The previous prime is 190961671477. The next prime is 190961671577. The reversal of 190961671541 is 145176169091.

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

It can be written as a sum of positive squares in 2 ways, for example, as 69471780625 + 121489890916 = 263575^2 + 348554^2 .

It is a cyclic number.

It is not a de Polignac number, because 190961671541 - 2⁶ = 190961671477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 190961671541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190961671591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 564386 + ... + 836931.

It is an arithmetic number, because the mean of its divisors is an integer number (47740802283).

Almost surely, 2^190961671541 is an apocalyptic number.

It is an amenable number.

190961671541 is a deficient number, since it is larger than the sum of its proper divisors (1537591).

190961671541 is a wasteful number, since it uses less digits than its factorization.

190961671541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537590.

The product of its (nonzero) digits is 408240, while the sum is 50.

The spelling of 190961671541 in words is "one hundred ninety billion, nine hundred sixty-one million, six hundred seventy-one thousand, five hundred forty-one".