194080154890 has 8 divisors (see below), whose sum is σ = 349344278820. Its totient is φ = 77632061952.

The previous prime is 194080154887. The next prime is 194080154899. The reversal of 194080154890 is 98451080491.

It can be written as a sum of positive squares in 2 ways, for example, as 182476771929 + 11603382961 = 427173^2 + 107719^2 .

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

It is not an unprimeable number, because it can be changed into a prime (194080154899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9704007735 + ... + 9704007754.

Almost surely, 2^194080154890 is an apocalyptic number.

194080154890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

194080154890 is a deficient number, since it is larger than the sum of its proper divisors (155264123930).

194080154890 is a wasteful number, since it uses less digits than its factorization.

194080154890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19408015496.

The product of its (nonzero) digits is 414720, while the sum is 49.

The spelling of 194080154890 in words is "one hundred ninety-four billion, eighty million, one hundred fifty-four thousand, eight hundred ninety".