121604653646 has 8 divisors (see below), whose sum is σ = 208465120560. Its totient is φ = 52116280128.

The previous prime is 121604653637. The next prime is 121604653697. The reversal of 121604653646 is 646356406121.

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

It is a junction number, because it is equal to n+sod(n) for n = 121604653597 and 121604653606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4343023331 + ... + 4343023358.

It is an arithmetic number, because the mean of its divisors is an integer number (26058140070).

Almost surely, 2^121604653646 is an apocalyptic number.

121604653646 is a deficient number, since it is larger than the sum of its proper divisors (86860466914).

121604653646 is an equidigital number, since it uses as much as digits as its factorization.

121604653646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8686046698.

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 121604653646 in words is "one hundred twenty-one billion, six hundred four million, six hundred fifty-three thousand, six hundred forty-six".