61603746217 has 8 divisors (see below), whose sum is σ = 66398403456. Its totient is φ = 56817075792.

The previous prime is 61603746203. The next prime is 61603746229. The reversal of 61603746217 is 71264730616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61603746217 is a prime.

It is a super-2 number, since 2×61603746217² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61603746257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1980673 + ... + 2011534.

It is an arithmetic number, because the mean of its divisors is an integer number (8299800432).

Almost surely, 2^61603746217 is an apocalyptic number.

It is an amenable number.

61603746217 is a deficient number, since it is larger than the sum of its proper divisors (4794657239).

61603746217 is a wasteful number, since it uses less digits than its factorization.

61603746217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3993407.

The product of its (nonzero) digits is 254016, while the sum is 43.

The spelling of 61603746217 in words is "sixty-one billion, six hundred three million, seven hundred forty-six thousand, two hundred seventeen".