655348072861 has 8 divisors (see below), whose sum is σ = 678133824120. Its totient is φ = 632574824448.

The previous prime is 655348072859. The next prime is 655348072889. The reversal of 655348072861 is 168270843556.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 64163929636 + 591184143225 = 253306^2 + 768885^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 655348072861 - 2¹ = 655348072859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655348072811) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3018996 + ... + 3228781.

It is an arithmetic number, because the mean of its divisors is an integer number (84766728015).

Almost surely, 2^655348072861 is an apocalyptic number.

It is an amenable number.

655348072861 is a deficient number, since it is larger than the sum of its proper divisors (22785751259).

655348072861 is a wasteful number, since it uses less digits than its factorization.

655348072861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6251423.

The product of its (nonzero) digits is 9676800, while the sum is 55.

The spelling of 655348072861 in words is "six hundred fifty-five billion, three hundred forty-eight million, seventy-two thousand, eight hundred sixty-one".