65611651056 has 40 divisors (see below), whose sum is σ = 193710589824. Its totient is φ = 18746185920.

The previous prime is 65611651051. The next prime is 65611651069. The reversal of 65611651056 is 65015611656.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 65611650999 and 65611651017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65611651051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97636050 + ... + 97636721.

Almost surely, 2^65611651056 is an apocalyptic number.

It is an amenable number.

65611651056 is an abundant number, since it is smaller than the sum of its proper divisors (128098938768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65611651056 is a wasteful number, since it uses less digits than its factorization.

65611651056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195272789 (or 195272783 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 65611651056 in words is "sixty-five billion, six hundred eleven million, six hundred fifty-one thousand, fifty-six".