55371513566 has 4 divisors (see below), whose sum is σ = 83057270352. Its totient is φ = 27685756782.

The previous prime is 55371513557. The next prime is 55371513601. The reversal of 55371513566 is 66531517355.

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

It is a self number, because there is not a number n which added to its sum of digits gives 55371513566.

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, 13842878390 + ... + 13842878393.

It is an arithmetic number, because the mean of its divisors is an integer number (20764317588).

Almost surely, 2^55371513566 is an apocalyptic number.

55371513566 is a deficient number, since it is larger than the sum of its proper divisors (27685756786).

55371513566 is a wasteful number, since it uses less digits than its factorization.

55371513566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27685756785.

The product of its digits is 1417500, while the sum is 47.

The spelling of 55371513566 in words is "fifty-five billion, three hundred seventy-one million, five hundred thirteen thousand, five hundred sixty-six".