61440549 has 8 divisors (see below), whose sum is σ = 82024992. Its totient is φ = 40908240.

The previous prime is 61440529. The next prime is 61440559. The reversal of 61440549 is 94504416.

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

It is not a de Polignac number, because 61440549 - 2⁵ = 61440517 is a prime.

It is a super-2 number, since 2×61440549² = 7549882122842802, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61440529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10194 + ... + 15059.

It is an arithmetic number, because the mean of its divisors is an integer number (10253124).

Almost surely, 2^61440549 is an apocalyptic number.

It is an amenable number.

61440549 is a deficient number, since it is larger than the sum of its proper divisors (20584443).

61440549 is a wasteful number, since it uses less digits than its factorization.

61440549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26067.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 61440549 is about 7838.4021968766. The cubic root of 61440549 is about 394.5951071936.

The spelling of 61440549 in words is "sixty-one million, four hundred forty thousand, five hundred forty-nine".