194794829640 has 160 divisors (see below), whose sum is σ = 661477897080. Its totient is φ = 51409686528.

The previous prime is 194794829609. The next prime is 194794829651. The reversal of 194794829640 is 46928497491.

194794829640 is a `hidden beast` number, since 1 + 94 + 7 + 9 + 482 + 9 + 64 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 187044140196 + 7750689444 = 432486^2 + 88038^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4374 + ... + 624186.

Almost surely, 2^194794829640 is an apocalyptic number.

194794829640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194794829640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330738948540).

194794829640 is an abundant number, since it is smaller than the sum of its proper divisors (466683067440).

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

194794829640 is a wasteful number, since it uses less digits than its factorization.

194794829640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619933 (or 619920 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The spelling of 194794829640 in words is "one hundred ninety-four billion, seven hundred ninety-four million, eight hundred twenty-nine thousand, six hundred forty".