84491750561 has 4 divisors (see below), whose sum is σ = 84506256432. Its totient is φ = 84477244692.

The previous prime is 84491750543. The next prime is 84491750573. The reversal of 84491750561 is 16505719448.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84491750561 - 2¹⁴ = 84491734177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84491756561) 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 3 ways as a sum of consecutive naturals, for example, 7244195 + ... + 7255848.

It is an arithmetic number, because the mean of its divisors is an integer number (21126564108).

Almost surely, 2^84491750561 is an apocalyptic number.

It is an amenable number.

84491750561 is a deficient number, since it is larger than the sum of its proper divisors (14505871).

84491750561 is a wasteful number, since it uses less digits than its factorization.

84491750561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14505870.

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 84491750561 in words is "eighty-four billion, four hundred ninety-one million, seven hundred fifty thousand, five hundred sixty-one".