65611655556 has 48 divisors (see below), whose sum is σ = 157257429504. Its totient is φ = 21275951616.

The previous prime is 65611655509. The next prime is 65611655563. The reversal of 65611655556 is 65555611656.

It is a junction number, because it is equal to n+sod(n) for n = 65611655499 and 65611655508.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5158701 + ... + 5171403.

It is an arithmetic number, because the mean of its divisors is an integer number (3276196448).

Almost surely, 2^65611655556 is an apocalyptic number.

It is an amenable number.

65611655556 is an abundant number, since it is smaller than the sum of its proper divisors (91645773948).

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

65611655556 is a wasteful number, since it uses less digits than its factorization.

65611655556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24380 (or 24378 counting only the distinct ones).

The product of its digits is 4050000, while the sum is 51.

The spelling of 65611655556 in words is "sixty-five billion, six hundred eleven million, six hundred fifty-five thousand, five hundred fifty-six".