61285418 has 4 divisors (see below), whose sum is σ = 91928130. Its totient is φ = 30642708.

The previous prime is 61285417. The next prime is 61285451. The reversal of 61285418 is 81458216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 45738169 + 15547249 = 6763^2 + 3943^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61285417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15321353 + ... + 15321356.

Almost surely, 2^61285418 is an apocalyptic number.

61285418 is a deficient number, since it is larger than the sum of its proper divisors (30642712).

61285418 is a wasteful number, since it uses less digits than its factorization.

61285418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30642711.

The product of its digits is 15360, while the sum is 35.

The square root of 61285418 is about 7828.5003672479. The cubic root of 61285418 is about 394.2627234146.

The spelling of 61285418 in words is "sixty-one million, two hundred eighty-five thousand, four hundred eighteen".