61321688 has 16 divisors (see below), whose sum is σ = 115712880. Its totient is φ = 30464928.

The previous prime is 61321661. The next prime is 61321717. The reversal of 61321688 is 88612316.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23156 + ... + 25667.

It is an arithmetic number, because the mean of its divisors is an integer number (7232055).

Almost surely, 2^61321688 is an apocalyptic number.

It is an amenable number.

61321688 is a deficient number, since it is larger than the sum of its proper divisors (54391192).

61321688 is a wasteful number, since it uses less digits than its factorization.

61321688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48986 (or 48982 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 61321688 is about 7830.8165602318. The cubic root of 61321688 is about 394.3404857349.

The spelling of 61321688 in words is "sixty-one million, three hundred twenty-one thousand, six hundred eighty-eight".