193640484921 has 8 divisors (see below), whose sum is σ = 278047875840. Its totient is φ = 119163375312.

The previous prime is 193640484889. The next prime is 193640484931. The reversal of 193640484921 is 129484046391.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 193640484921 - 2⁵ = 193640484889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (193640484931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2482570281 + ... + 2482570358.

It is an arithmetic number, because the mean of its divisors is an integer number (34755984480).

Almost surely, 2^193640484921 is an apocalyptic number.

It is an amenable number.

193640484921 is a deficient number, since it is larger than the sum of its proper divisors (84407390919).

193640484921 is a wasteful number, since it uses less digits than its factorization.

193640484921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4965140655.

The product of its (nonzero) digits is 1492992, while the sum is 51.

The spelling of 193640484921 in words is "one hundred ninety-three billion, six hundred forty million, four hundred eighty-four thousand, nine hundred twenty-one".