61720088 has 16 divisors (see below), whose sum is σ = 118548360. Its totient is φ = 30107200.

The previous prime is 61720079. The next prime is 61720111. The reversal of 61720088 is 88002716.

61720088 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93758 + ... + 94413.

Almost surely, 2^61720088 is an apocalyptic number.

It is an amenable number.

61720088 is a deficient number, since it is larger than the sum of its proper divisors (56828272).

61720088 is a wasteful number, since it uses less digits than its factorization.

61720088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188218 (or 188214 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 61720088 is about 7856.2133372255. The cubic root of 61720088 is about 395.1926379709.

The spelling of 61720088 in words is "sixty-one million, seven hundred twenty thousand, eighty-eight".