191467650561 has 32 divisors (see below), whose sum is σ = 280567497600. Its totient is φ = 115179993600.

The previous prime is 191467650551. The next prime is 191467650571. The reversal of 191467650561 is 165056764191.

It is an interprime number because it is at equal distance from previous prime (191467650551) and next prime (191467650571).

It is not a de Polignac number, because 191467650561 - 2¹⁰ = 191467649537 is a prime.

It is a super-2 number, since 2×191467650561² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (191467650551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7268931 + ... + 7295223.

It is an arithmetic number, because the mean of its divisors is an integer number (8767734300).

Almost surely, 2^191467650561 is an apocalyptic number.

191467650561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

191467650561 is a deficient number, since it is larger than the sum of its proper divisors (89099847039).

191467650561 is a wasteful number, since it uses less digits than its factorization.

191467650561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27937.

The product of its (nonzero) digits is 1360800, while the sum is 51.

The spelling of 191467650561 in words is "one hundred ninety-one billion, four hundred sixty-seven million, six hundred fifty thousand, five hundred sixty-one".