61814605 has 8 divisors (see below), whose sum is σ = 76182552. Its totient is φ = 48115008.

The previous prime is 61814591. The next prime is 61814609. The reversal of 61814605 is 50641816.

It can be written as a sum of positive squares in 4 ways, for example, as 39715204 + 22099401 = 6302^2 + 4701^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61814605 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61814609) 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, 166882 + ... + 167251.

It is an arithmetic number, because the mean of its divisors is an integer number (9522819).

Almost surely, 2^61814605 is an apocalyptic number.

It is an amenable number.

61814605 is a deficient number, since it is larger than the sum of its proper divisors (14367947).

61814605 is a wasteful number, since it uses less digits than its factorization.

61814605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334175.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 61814605 is about 7862.2264658301. The cubic root of 61814605 is about 395.3942653127.

The spelling of 61814605 in words is "sixty-one million, eight hundred fourteen thousand, six hundred five".