61395681 has 8 divisors (see below), whose sum is σ = 82847520. Its totient is φ = 40437152.

The previous prime is 61395673. The next prime is 61395689. The reversal of 61395681 is 18659316.

61395681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61395673) and next prime (61395689).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61395681 - 2³ = 61395673 is a prime.

It is a super-2 number, since 2×61395681² = 7538859290907522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61395689) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 123036 + ... + 123533.

It is an arithmetic number, because the mean of its divisors is an integer number (10355940).

Almost surely, 2^61395681 is an apocalyptic number.

It is an amenable number.

61395681 is a deficient number, since it is larger than the sum of its proper divisors (21451839).

61395681 is a wasteful number, since it uses less digits than its factorization.

61395681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246655.

The product of its digits is 38880, while the sum is 39.

The square root of 61395681 is about 7835.5396112840. The cubic root of 61395681 is about 394.4990305524.

The spelling of 61395681 in words is "sixty-one million, three hundred ninety-five thousand, six hundred eighty-one".