61781614 has 8 divisors (see below), whose sum is σ = 94243320. Its totient is φ = 30367176.

The previous prime is 61781609. The next prime is 61781617. The reversal of 61781614 is 41618716.

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

It is a self number, because there is not a number n which added to its sum of digits gives 61781614.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61781617) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 261669 + ... + 261904.

It is an arithmetic number, because the mean of its divisors is an integer number (11780415).

Almost surely, 2^61781614 is an apocalyptic number.

61781614 is a deficient number, since it is larger than the sum of its proper divisors (32461706).

61781614 is a wasteful number, since it uses less digits than its factorization.

61781614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523634.

The product of its digits is 8064, while the sum is 34.

The square root of 61781614 is about 7860.1281160042. The cubic root of 61781614 is about 395.3239109925.

The spelling of 61781614 in words is "sixty-one million, seven hundred eighty-one thousand, six hundred fourteen".