61779441 has 8 divisors (see below), whose sum is σ = 82409184. Its totient is φ = 41168000.

The previous prime is 61779437. The next prime is 61779457. The reversal of 61779441 is 14497716.

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 61779441 - 2² = 61779437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61779441.

It is not an unprimeable number, because it can be changed into a prime (61779401) 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 7 ways as a sum of consecutive naturals, for example, 9430 + ... + 14576.

It is an arithmetic number, because the mean of its divisors is an integer number (10301148).

Almost surely, 2^61779441 is an apocalyptic number.

It is an amenable number.

61779441 is a deficient number, since it is larger than the sum of its proper divisors (20629743).

61779441 is a wasteful number, since it uses less digits than its factorization.

61779441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9151.

The product of its digits is 42336, while the sum is 39.

The square root of 61779441 is about 7859.9898854897. The cubic root of 61779441 is about 395.3192761242.

The spelling of 61779441 in words is "sixty-one million, seven hundred seventy-nine thousand, four hundred forty-one".