55561516 has 6 divisors (see below), whose sum is σ = 97232660. Its totient is φ = 27780756.

The previous prime is 55561511. The next prime is 55561523. The reversal of 55561516 is 61516555.

It is not an unprimeable number, because it can be changed into a prime (55561511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6945186 + ... + 6945193.

Almost surely, 2^55561516 is an apocalyptic number.

It is an amenable number.

55561516 is a deficient number, since it is larger than the sum of its proper divisors (41671144).

55561516 is a wasteful number, since it uses less digits than its factorization.

55561516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13890383 (or 13890381 counting only the distinct ones).

The product of its digits is 22500, while the sum is 34.

The square root of 55561516 is about 7453.9597530440. The cubic root of 55561516 is about 381.5850597078.

The spelling of 55561516 in words is "fifty-five million, five hundred sixty-one thousand, five hundred sixteen".