55605616551 has 24 divisors (see below), whose sum is σ = 80677333776. Its totient is φ = 36905431680.

The previous prime is 55605616519. The next prime is 55605616597. The reversal of 55605616551 is 15561650655.

It is not a de Polignac number, because 55605616551 - 2⁵ = 55605616519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55605616497 and 55605616506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55605616511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2300736 + ... + 2324778.

It is an arithmetic number, because the mean of its divisors is an integer number (3361555574).

Almost surely, 2^55605616551 is an apocalyptic number.

55605616551 is a deficient number, since it is larger than the sum of its proper divisors (25071717225).

55605616551 is a wasteful number, since it uses less digits than its factorization.

55605616551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25183 (or 25180 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 45.

The spelling of 55605616551 in words is "fifty-five billion, six hundred five million, six hundred sixteen thousand, five hundred fifty-one".