61215635713 has 4 divisors (see below), whose sum is σ = 61471768320. Its totient is φ = 60959503108.

The previous prime is 61215635707. The next prime is 61215635771. The reversal of 61215635713 is 31753651216.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61215635713 - 2²⁹ = 60678764801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61215635113) 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, 128065945 + ... + 128066422.

It is an arithmetic number, because the mean of its divisors is an integer number (15367942080).

Almost surely, 2^61215635713 is an apocalyptic number.

It is an amenable number.

61215635713 is a deficient number, since it is larger than the sum of its proper divisors (256132607).

61215635713 is a wasteful number, since it uses less digits than its factorization.

61215635713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256132606.

The product of its digits is 113400, while the sum is 40.

The spelling of 61215635713 in words is "sixty-one billion, two hundred fifteen million, six hundred thirty-five thousand, seven hundred thirteen".