61640716255453 has 16 divisors (see below), whose sum is σ = 62841498148800. Its totient is φ = 60452062070400.

The previous prime is 61640716255361. The next prime is 61640716255501. The reversal of 61640716255453 is 35455261704616.

It is a cyclic number.

It is not a de Polignac number, because 61640716255453 - 2⁹ = 61640716254941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61640716255394 and 61640716255403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61640716250453) 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, 10631475 + ... + 15372367.

It is an arithmetic number, because the mean of its divisors is an integer number (3927593634300).

Almost surely, 2^{61640716255453} is an apocalyptic number.

It is an amenable number.

61640716255453 is a deficient number, since it is larger than the sum of its proper divisors (1200781893347).

61640716255453 is a wasteful number, since it uses less digits than its factorization.

61640716255453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4742172.

The product of its (nonzero) digits is 18144000, while the sum is 55.

The spelling of 61640716255453 in words is "sixty-one trillion, six hundred forty billion, seven hundred sixteen million, two hundred fifty-five thousand, four hundred fifty-three".