55103840146 has 4 divisors (see below), whose sum is σ = 82655760222. Its totient is φ = 27551920072.

The previous prime is 55103840123. The next prime is 55103840153. The reversal of 55103840146 is 64104830155.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 42885853921 + 12217986225 = 207089^2 + 110535^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13775960035 + ... + 13775960038.

Almost surely, 2^55103840146 is an apocalyptic number.

55103840146 is a deficient number, since it is larger than the sum of its proper divisors (27551920076).

55103840146 is a wasteful number, since it uses less digits than its factorization.

55103840146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27551920075.

The product of its (nonzero) digits is 57600, while the sum is 37.

Subtracting 55103840146 from its reverse (64104830155), we obtain a palindrome (9000990009).

The spelling of 55103840146 in words is "fifty-five billion, one hundred three million, eight hundred forty thousand, one hundred forty-six".