55113531566 has 4 divisors (see below), whose sum is σ = 82670297352. Its totient is φ = 27556765782.

The previous prime is 55113531547. The next prime is 55113531587. The reversal of 55113531566 is 66513531155.

It is a happy number.

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, 13778382890 + ... + 13778382893.

It is an arithmetic number, because the mean of its divisors is an integer number (20667574338).

Almost surely, 2^55113531566 is an apocalyptic number.

55113531566 is a deficient number, since it is larger than the sum of its proper divisors (27556765786).

55113531566 is a wasteful number, since it uses less digits than its factorization.

55113531566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27556765785.

The product of its digits is 202500, while the sum is 41.

The spelling of 55113531566 in words is "fifty-five billion, one hundred thirteen million, five hundred thirty-one thousand, five hundred sixty-six".