61640716 has 6 divisors (see below), whose sum is σ = 107871260. Its totient is φ = 30820356.

The previous prime is 61640707. The next prime is 61640717. The reversal of 61640716 is 61704616.

It is not an unprimeable number, because it can be changed into a prime (61640717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7705086 + ... + 7705093.

Almost surely, 2^61640716 is an apocalyptic number.

It is an amenable number.

61640716 is a deficient number, since it is larger than the sum of its proper divisors (46230544).

61640716 is a wasteful number, since it uses less digits than its factorization.

61640716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15410183 (or 15410181 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 61640716 is about 7851.1601690451. The cubic root of 61640716 is about 395.0231594603.

The spelling of 61640716 in words is "sixty-one million, six hundred forty thousand, seven hundred sixteen".