53661646646 has 4 divisors (see below), whose sum is σ = 80492469972. Its totient is φ = 26830823322.

The previous prime is 53661646637. The next prime is 53661646657. The reversal of 53661646646 is 64664616635.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13415411660 + ... + 13415411663.

It is an arithmetic number, because the mean of its divisors is an integer number (20123117493).

Almost surely, 2^53661646646 is an apocalyptic number.

53661646646 is a deficient number, since it is larger than the sum of its proper divisors (26830823326).

53661646646 is a wasteful number, since it uses less digits than its factorization.

53661646646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26830823325.

The product of its digits is 11197440, while the sum is 53.

The spelling of 53661646646 in words is "fifty-three billion, six hundred sixty-one million, six hundred forty-six thousand, six hundred forty-six".