193993616640 has 144 divisors (see below), whose sum is σ = 636312636288. Its totient is φ = 50333442048.

The previous prime is 193993616629. The next prime is 193993616699. The reversal of 193993616640 is 46616399391.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 540612 + ... + 824771.

It is an arithmetic number, because the mean of its divisors is an integer number (4418837752).

Almost surely, 2^193993616640 is an apocalyptic number.

193993616640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

193993616640 is an abundant number, since it is smaller than the sum of its proper divisors (442319019648).

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

193993616640 is a wasteful number, since it uses less digits than its factorization.

193993616640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365444 (or 1365430 counting only the distinct ones).

The product of its (nonzero) digits is 5668704, while the sum is 57.

The spelling of 193993616640 in words is "one hundred ninety-three billion, nine hundred ninety-three million, six hundred sixteen thousand, six hundred forty".