61854549 has 16 divisors (see below), whose sum is σ = 84250560. Its totient is φ = 40354560.

The previous prime is 61854539. The next prime is 61854553. The reversal of 61854549 is 94545816.

It is not a de Polignac number, because 61854549 - 2⁷ = 61854421 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 61854549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61854539) 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 15 ways as a sum of consecutive naturals, for example, 40797 + ... + 42285.

It is an arithmetic number, because the mean of its divisors is an integer number (5265660).

Almost surely, 2^61854549 is an apocalyptic number.

It is an amenable number.

61854549 is a deficient number, since it is larger than the sum of its proper divisors (22396011).

61854549 is a wasteful number, since it uses less digits than its factorization.

61854549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780.

The product of its digits is 172800, while the sum is 42.

The square root of 61854549 is about 7864.7663029489. The cubic root of 61854549 is about 395.4794136249.

The spelling of 61854549 in words is "sixty-one million, eight hundred fifty-four thousand, five hundred forty-nine".