194145199545 has 16 divisors (see below), whose sum is σ = 338871621312. Its totient is φ = 94131005760.

The previous prime is 194145199541. The next prime is 194145199561. The reversal of 194145199545 is 545991541491.

It is not a de Polignac number, because 194145199545 - 2² = 194145199541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (194145199541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 588318622 + ... + 588318951.

It is an arithmetic number, because the mean of its divisors is an integer number (21179476332).

Almost surely, 2^194145199545 is an apocalyptic number.

194145199545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

194145199545 is a deficient number, since it is larger than the sum of its proper divisors (144726421767).

194145199545 is a wasteful number, since it uses less digits than its factorization.

194145199545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176637592.

The product of its digits is 5832000, while the sum is 57.

The spelling of 194145199545 in words is "one hundred ninety-four billion, one hundred forty-five million, one hundred ninety-nine thousand, five hundred forty-five".