61380681 has 8 divisors (see below), whose sum is σ = 81877440. Its totient is φ = 40902192.

The previous prime is 61380679. The next prime is 61380691. The reversal of 61380681 is 18608316.

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

It is not a de Polignac number, because 61380681 - 2¹ = 61380679 is a prime.

It is a super-2 number, since 2×61380681² = 7535176000047522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61380611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9235 + ... + 14423.

It is an arithmetic number, because the mean of its divisors is an integer number (10234680).

Almost surely, 2^61380681 is an apocalyptic number.

It is an amenable number.

61380681 is a deficient number, since it is larger than the sum of its proper divisors (20496759).

61380681 is a wasteful number, since it uses less digits than its factorization.

61380681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9135.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 61380681 is about 7834.5823755960. The cubic root of 61380681 is about 394.4669003475.

Adding to 61380681 its reverse (18608316), we get a palindrome (79988997).

The spelling of 61380681 in words is "sixty-one million, three hundred eighty thousand, six hundred eighty-one".