65555510551 has 32 divisors (see below), whose sum is σ = 75199069440. Its totient is φ = 56760528384.

The previous prime is 65555510549. The next prime is 65555510557. The reversal of 65555510551 is 15501555556.

It is not a de Polignac number, because 65555510551 - 2¹ = 65555510549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a junction number, because it is equal to n+sod(n) for n = 65555510498 and 65555510507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65555510557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2389156 + ... + 2416438.

It is an arithmetic number, because the mean of its divisors is an integer number (2349970920).

Almost surely, 2^65555510551 is an apocalyptic number.

65555510551 is a deficient number, since it is larger than the sum of its proper divisors (9643558889).

65555510551 is a wasteful number, since it uses less digits than its factorization.

65555510551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27535.

The product of its (nonzero) digits is 468750, while the sum is 43.

The spelling of 65555510551 in words is "sixty-five billion, five hundred fifty-five million, five hundred ten thousand, five hundred fifty-one".