61301309720 has 32 divisors (see below), whose sum is σ = 157631940000. Its totient is φ = 21017591808.

The previous prime is 61301309711. The next prime is 61301309747. The reversal of 61301309720 is 2790310316.

It is a happy number.

It is a congruent number.

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, 109466345 + ... + 109466904.

It is an arithmetic number, because the mean of its divisors is an integer number (4925998125).

Almost surely, 2^61301309720 is an apocalyptic number.

It is an amenable number.

61301309720 is an abundant number, since it is smaller than the sum of its proper divisors (96330630280).

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

61301309720 is a wasteful number, since it uses less digits than its factorization.

61301309720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218933267 (or 218933263 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 32.

The spelling of 61301309720 in words is "sixty-one billion, three hundred one million, three hundred nine thousand, seven hundred twenty".