191508748161 has 8 divisors (see below), whose sum is σ = 255531795264. Its totient is φ = 127579099920.

The previous prime is 191508748159. The next prime is 191508748163. The reversal of 191508748161 is 161847805191.

It is an interprime number because it is at equal distance from previous prime (191508748159) and next prime (191508748163).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 191508748161 - 2¹ = 191508748159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (191508748163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23344930 + ... + 23353131.

It is an arithmetic number, because the mean of its divisors is an integer number (31941474408).

Almost surely, 2^191508748161 is an apocalyptic number.

It is an amenable number.

191508748161 is a deficient number, since it is larger than the sum of its proper divisors (64023047103).

191508748161 is a wasteful number, since it uses less digits than its factorization.

191508748161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46699431.

The product of its (nonzero) digits is 483840, while the sum is 51.

The spelling of 191508748161 in words is "one hundred ninety-one billion, five hundred eight million, seven hundred forty-eight thousand, one hundred sixty-one".