61226844438655 has 16 divisors (see below), whose sum is σ = 83981494578240. Its totient is φ = 41977496512512.

The previous prime is 61226844438653. The next prime is 61226844438671. The reversal of 61226844438655 is 55683444862216.

It is a cyclic number.

It is not a de Polignac number, because 61226844438655 - 2¹ = 61226844438653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61226844438653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137803960 + ... + 138247549.

It is an arithmetic number, because the mean of its divisors is an integer number (5248843411140).

Almost surely, 2^{61226844438655} is an apocalyptic number.

61226844438655 is a deficient number, since it is larger than the sum of its proper divisors (22754650139585).

61226844438655 is a wasteful number, since it uses less digits than its factorization.

61226844438655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276057858.

The product of its digits is 265420800, while the sum is 64.

The spelling of 61226844438655 in words is "sixty-one trillion, two hundred twenty-six billion, eight hundred forty-four million, four hundred thirty-eight thousand, six hundred fifty-five".