61005363517 has 4 divisors (see below), whose sum is σ = 69720415456. Its totient is φ = 52290311580.

The previous prime is 61005363499. The next prime is 61005363589. The reversal of 61005363517 is 71536350016.

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 a de Polignac number, because none of the positive numbers 2^k-61005363517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61005361517) 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, 4357525959 + ... + 4357525972.

It is an arithmetic number, because the mean of its divisors is an integer number (17430103864).

Almost surely, 2^61005363517 is an apocalyptic number.

It is an amenable number.

61005363517 is a deficient number, since it is larger than the sum of its proper divisors (8715051939).

61005363517 is an equidigital number, since it uses as much as digits as its factorization.

61005363517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8715051938.

The product of its (nonzero) digits is 56700, while the sum is 37.

The spelling of 61005363517 in words is "sixty-one billion, five million, three hundred sixty-three thousand, five hundred seventeen".