655401661153 has 4 divisors (see below), whose sum is σ = 656048652948. Its totient is φ = 654754669360.

The previous prime is 655401661151. The next prime is 655401661157. The reversal of 655401661153 is 351166104556.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76542415569 + 578859245584 = 276663^2 + 760828^2 .

It is a cyclic number.

It is not a de Polignac number, because 655401661153 - 2¹ = 655401661151 is a prime.

It is a super-2 number, since 2×655401661153² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655401661151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323494378 + ... + 323496403.

It is an arithmetic number, because the mean of its divisors is an integer number (164012163237).

Almost surely, 2^655401661153 is an apocalyptic number.

It is an amenable number.

655401661153 is a deficient number, since it is larger than the sum of its proper divisors (646991795).

655401661153 is a wasteful number, since it uses less digits than its factorization.

655401661153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646991794.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 655401661153 in words is "six hundred fifty-five billion, four hundred one million, six hundred sixty-one thousand, one hundred fifty-three".