61715634017 has 4 divisors (see below), whose sum is σ = 61724509440. Its totient is φ = 61706758596.

The previous prime is 61715634011. The next prime is 61715634049. The reversal of 61715634017 is 71043651716.

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 61715634017 - 2²⁰ = 61714585441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61715634011) 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, 4427273 + ... + 4441190.

It is an arithmetic number, because the mean of its divisors is an integer number (15431127360).

Almost surely, 2^61715634017 is an apocalyptic number.

It is an amenable number.

61715634017 is a deficient number, since it is larger than the sum of its proper divisors (8875423).

61715634017 is an equidigital number, since it uses as much as digits as its factorization.

61715634017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8875422.

The product of its (nonzero) digits is 105840, while the sum is 41.

The spelling of 61715634017 in words is "sixty-one billion, seven hundred fifteen million, six hundred thirty-four thousand, seventeen".