61709245328 has 40 divisors (see below), whose sum is σ = 120154419000. Its totient is φ = 30702034944.

The previous prime is 61709245303. The next prime is 61709245337. The reversal of 61709245328 is 82354290716.

It can be written as a sum of positive squares in 4 ways, for example, as 26285488384 + 35423756944 = 162128^2 + 188212^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2668118 + ... + 2691146.

It is an arithmetic number, because the mean of its divisors is an integer number (3003860475).

It is a 1-persistent number, because it is pandigital, but 2⋅61709245328 = 123418490656 is not.

Almost surely, 2^61709245328 is an apocalyptic number.

It is an amenable number.

61709245328 is a deficient number, since it is larger than the sum of its proper divisors (58445173672).

61709245328 is a wasteful number, since it uses less digits than its factorization.

61709245328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23859 (or 23853 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 61709245328 in words is "sixty-one billion, seven hundred nine million, two hundred forty-five thousand, three hundred twenty-eight".