61720664300 has 36 divisors (see below), whose sum is σ = 133968935856. Its totient is φ = 24681796800.

The previous prime is 61720664233. The next prime is 61720664329. The reversal of 61720664300 is 346602716.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 312194 + ... + 470006.

Almost surely, 2^61720664300 is an apocalyptic number.

It is an amenable number.

61720664300 is an abundant number, since it is smaller than the sum of its proper divisors (72248271556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61720664300 is a wasteful number, since it uses less digits than its factorization.

61720664300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161738 (or 161731 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The spelling of 61720664300 in words is "sixty-one billion, seven hundred twenty million, six hundred sixty-four thousand, three hundred".