61245546613 has 4 divisors (see below), whose sum is σ = 61656590700. Its totient is φ = 60834502528.

The previous prime is 61245546581. The next prime is 61245546623. The reversal of 61245546613 is 31664554216.

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 8746364484 + 52499182129 = 93522^2 + 229127^2 .

It is a cyclic number.

It is not a de Polignac number, because 61245546613 - 2⁵ = 61245546581 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61245546613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61245546623) 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, 205521820 + ... + 205522117.

It is an arithmetic number, because the mean of its divisors is an integer number (15414147675).

Almost surely, 2^61245546613 is an apocalyptic number.

It is an amenable number.

61245546613 is a deficient number, since it is larger than the sum of its proper divisors (411044087).

61245546613 is a wasteful number, since it uses less digits than its factorization.

61245546613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411044086.

The product of its digits is 518400, while the sum is 43.

The spelling of 61245546613 in words is "sixty-one billion, two hundred forty-five million, five hundred forty-six thousand, six hundred thirteen".