194040004536 has 96 divisors (see below), whose sum is σ = 601235706240. Its totient is φ = 55381322304.

The previous prime is 194040004493. The next prime is 194040004537. The reversal of 194040004536 is 635400040491.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 194040004536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194040004537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 274015 + ... + 680561.

It is an arithmetic number, because the mean of its divisors is an integer number (6262871940).

Almost surely, 2^194040004536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194040004536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300617853120).

194040004536 is an abundant number, since it is smaller than the sum of its proper divisors (407195701704).

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

194040004536 is a wasteful number, since it uses less digits than its factorization.

194040004536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407513 (or 407506 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 194040004536 in words is "one hundred ninety-four billion, forty million, four thousand, five hundred thirty-six".