61609668 has 48 divisors (see below), whose sum is σ = 147705600. Its totient is φ = 19977984.

The previous prime is 61609657. The next prime is 61609673. The reversal of 61609668 is 86690616.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176358 + ... + 176706.

It is an arithmetic number, because the mean of its divisors is an integer number (3077200).

Almost surely, 2^61609668 is an apocalyptic number.

It is an amenable number.

61609668 is an abundant number, since it is smaller than the sum of its proper divisors (86095932).

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

61609668 is a wasteful number, since it uses less digits than its factorization.

61609668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 61609668 is about 7849.1826326058. The cubic root of 61609668 is about 394.9568248489.

The spelling of 61609668 in words is "sixty-one million, six hundred nine thousand, six hundred sixty-eight".