655645651092 has 18 divisors (see below), whose sum is σ = 1657326507018. Its totient is φ = 218548550352.

The previous prime is 655645651079. The next prime is 655645651147. The reversal of 655645651092 is 290156546556.

It is a happy number.

655645651092 is a `hidden beast` number, since 6 + 5 + 5 + 64 + 565 + 10 + 9 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 615355526916 + 40290124176 = 784446^2 + 200724^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9106189563 + ... + 9106189634.

Almost surely, 2^655645651092 is an apocalyptic number.

It is an amenable number.

655645651092 is an abundant number, since it is smaller than the sum of its proper divisors (1001680855926).

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

655645651092 is a wasteful number, since it uses less digits than its factorization.

655645651092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18212379207 (or 18212379202 counting only the distinct ones).

The product of its (nonzero) digits is 9720000, while the sum is 54.

The spelling of 655645651092 in words is "six hundred fifty-five billion, six hundred forty-five million, six hundred fifty-one thousand, ninety-two".