194468888864531 has 2 divisors, whose sum is σ = 194468888864532. Its totient is φ = 194468888864530.

The previous prime is 194468888864363. The next prime is 194468888864543. The reversal of 194468888864531 is 135468888864491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 194468888864531 - 2⁴⁶ = 124100144686867 is a prime.

It is a super-2 number, since 2×194468888864531² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 194468888864531.

It is not a weakly prime, because it can be changed into another prime (194468888864561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97234444432265 + 97234444432266.

It is an arithmetic number, because the mean of its divisors is an integer number (97234444432266).

Almost surely, 2^{194468888864531} is an apocalyptic number.

194468888864531 is a deficient number, since it is larger than the sum of its proper divisors (1).

194468888864531 is an equidigital number, since it uses as much as digits as its factorization.

194468888864531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10192158720, while the sum is 83.

The spelling of 194468888864531 in words is "one hundred ninety-four trillion, four hundred sixty-eight billion, eight hundred eighty-eight million, eight hundred sixty-four thousand, five hundred thirty-one".