655011061556 has 6 divisors (see below), whose sum is σ = 1146269357730. Its totient is φ = 327505530776.

The previous prime is 655011061553. The next prime is 655011061597. The reversal of 655011061556 is 655160110556.

It can be written as a sum of positive squares in only one way, i.e., 646631489956 + 8379571600 = 804134^2 + 91540^2 .

It is a super-2 number, since 2×655011061556² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655011061553) 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 as a sum of consecutive naturals, namely, 81876382691 + ... + 81876382698.

It is an arithmetic number, because the mean of its divisors is an integer number (191044892955).

Almost surely, 2^655011061556 is an apocalyptic number.

It is an amenable number.

655011061556 is a deficient number, since it is larger than the sum of its proper divisors (491258296174).

655011061556 is a wasteful number, since it uses less digits than its factorization.

655011061556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163752765393 (or 163752765391 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 655011061556 in words is "six hundred fifty-five billion, eleven million, sixty-one thousand, five hundred fifty-six".