194820136513 has 8 divisors (see below), whose sum is σ = 195469376256. Its totient is φ = 194171878800.

The previous prime is 194820136501. The next prime is 194820136517. The reversal of 194820136513 is 315631028491.

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

It is a cyclic number.

It is not a de Polignac number, because 194820136513 - 2²⁹ = 194283265601 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 194820136513.

It is not an unprimeable number, because it can be changed into a prime (194820136517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152998 + ... + 642688.

It is an arithmetic number, because the mean of its divisors is an integer number (24433672032).

Almost surely, 2^194820136513 is an apocalyptic number.

It is an amenable number.

194820136513 is a deficient number, since it is larger than the sum of its proper divisors (649239743).

194820136513 is an equidigital number, since it uses as much as digits as its factorization.

194820136513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491015.

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 194820136513 in words is "one hundred ninety-four billion, eight hundred twenty million, one hundred thirty-six thousand, five hundred thirteen".