194538835491 has 96 divisors (see below), whose sum is σ = 353148171264. Its totient is φ = 92688710400.

The previous prime is 194538835489. The next prime is 194538835499.

It is a happy number.

194538835491 is nontrivially palindromic in base 10.

194538835491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 194538835491 - 2¹ = 194538835489 is a prime.

It is a super-2 number, since 2×194538835491² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (194538835499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5167426 + ... + 5204936.

It is an arithmetic number, because the mean of its divisors is an integer number (3678626784).

Almost surely, 2^194538835491 is an apocalyptic number.

194538835491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

194538835491 is a deficient number, since it is larger than the sum of its proper divisors (158609335773).

194538835491 is a wasteful number, since it uses less digits than its factorization.

194538835491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37713 (or 37702 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 60.

The spelling of 194538835491 in words is "one hundred ninety-four billion, five hundred thirty-eight million, eight hundred thirty-five thousand, four hundred ninety-one".