193640966637496 has 32 divisors (see below), whose sum is σ = 420197395968000. Its totient is φ = 81938492210016.

The previous prime is 193640966637463. The next prime is 193640966637497. The reversal of 193640966637496 is 694736669046391.

It is a Smith number, since the sum of its digits (79) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (79).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193640966637497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21885276616 + ... + 21885285463.

It is an arithmetic number, because the mean of its divisors is an integer number (13131168624000).

Almost surely, 2^{193640966637496} is an apocalyptic number.

It is an amenable number.

193640966637496 is an abundant number, since it is smaller than the sum of its proper divisors (226556429330504).

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

193640966637496 is a wasteful number, since it uses less digits than its factorization.

193640966637496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43770562171 (or 43770562167 counting only the distinct ones).

The product of its (nonzero) digits is 5714053632, while the sum is 79.

The spelling of 193640966637496 in words is "one hundred ninety-three trillion, six hundred forty billion, nine hundred sixty-six million, six hundred thirty-seven thousand, four hundred ninety-six".