61211573867513 has 8 divisors (see below), whose sum is σ = 61324841118048. Its totient is φ = 61098311592864.

The previous prime is 61211573867497. The next prime is 61211573867533. The reversal of 61211573867513 is 31576837511216.

It is a happy number.

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 61211573867513 - 2⁴ = 61211573867497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61211573867533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23849870 + ... + 26291432.

It is an arithmetic number, because the mean of its divisors is an integer number (7665605139756).

Almost surely, 2^{61211573867513} is an apocalyptic number.

It is an amenable number.

61211573867513 is a deficient number, since it is larger than the sum of its proper divisors (113267250535).

61211573867513 is a wasteful number, since it uses less digits than its factorization.

61211573867513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2487943.

The product of its digits is 6350400, while the sum is 56.

The spelling of 61211573867513 in words is "sixty-one trillion, two hundred eleven billion, five hundred seventy-three million, eight hundred sixty-seven thousand, five hundred thirteen".