194901878514 has 128 divisors (see below), whose sum is σ = 501262110720. Its totient is φ = 49230720000.

The previous prime is 194901878497. The next prime is 194901878519. The reversal of 194901878514 is 415878109491.

194901878514 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (194901878519) 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 63 ways as a sum of consecutive naturals, for example, 623014 + ... + 882014.

It is an arithmetic number, because the mean of its divisors is an integer number (3916110240).

Almost surely, 2^194901878514 is an apocalyptic number.

194901878514 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 194901878514, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250631055360).

194901878514 is an abundant number, since it is smaller than the sum of its proper divisors (306360232206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

194901878514 is a wasteful number, since it uses less digits than its factorization.

194901878514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259096.

The product of its (nonzero) digits is 2903040, while the sum is 57.

The spelling of 194901878514 in words is "one hundred ninety-four billion, nine hundred one million, eight hundred seventy-eight thousand, five hundred fourteen".