61818419 has 16 divisors (see below), whose sum is σ = 70375200. Its totient is φ = 53830656.

The previous prime is 61818389. The next prime is 61818431. The reversal of 61818419 is 91481816.

It is a cyclic number.

It is not a de Polignac number, because 61818419 - 2¹⁶ = 61752883 is a prime.

It is a super-2 number, since 2×61818419² = 7643033855319122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61818469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86837 + ... + 87545.

It is an arithmetic number, because the mean of its divisors is an integer number (4398450).

Almost surely, 2^61818419 is an apocalyptic number.

61818419 is a deficient number, since it is larger than the sum of its proper divisors (8556781).

61818419 is a wasteful number, since it uses less digits than its factorization.

61818419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094.

The product of its digits is 13824, while the sum is 38.

The square root of 61818419 is about 7862.4690142474. The cubic root of 61818419 is about 395.4023971704.

The spelling of 61818419 in words is "sixty-one million, eight hundred eighteen thousand, four hundred nineteen".