61681115 has 8 divisors (see below), whose sum is σ = 76569840. Its totient is φ = 47643232.

The previous prime is 61681079. The next prime is 61681153. The reversal of 61681115 is 51118616.

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 61681115 - 2¹⁴ = 61664731 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212549 + ... + 212838.

It is an arithmetic number, because the mean of its divisors is an integer number (9571230).

Almost surely, 2^61681115 is an apocalyptic number.

61681115 is a deficient number, since it is larger than the sum of its proper divisors (14888725).

61681115 is a wasteful number, since it uses less digits than its factorization.

61681115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425421.

The product of its digits is 1440, while the sum is 29.

The square root of 61681115 is about 7853.7325521054. The cubic root of 61681115 is about 395.1094393121.

The spelling of 61681115 in words is "sixty-one million, six hundred eighty-one thousand, one hundred fifteen".