121615646 has 8 divisors (see below), whose sum is σ = 182554560. Its totient is φ = 60764128.

The previous prime is 121615619. The next prime is 121615661. The reversal of 121615646 is 646516121.

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

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, 18251 + ... + 24006.

It is an arithmetic number, because the mean of its divisors is an integer number (22819320).

Almost surely, 2^121615646 is an apocalyptic number.

121615646 is a deficient number, since it is larger than the sum of its proper divisors (60938914).

121615646 is a wasteful number, since it uses less digits than its factorization.

121615646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43698.

The product of its digits is 8640, while the sum is 32.

The square root of 121615646 is about 11027.9484039417. The cubic root of 121615646 is about 495.4461793467.

The spelling of 121615646 in words is "one hundred twenty-one million, six hundred fifteen thousand, six hundred forty-six".