61164549 has 12 divisors (see below), whose sum is σ = 88455276. Its totient is φ = 40727232.

The previous prime is 61164547. The next prime is 61164557. The reversal of 61164549 is 94546116.

61164549 is a `hidden beast` number, since 6 + 1 + 1 + 645 + 4 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21095649 + 40068900 = 4593^2 + 6330^2 .

It is not a de Polignac number, because 61164549 - 2¹ = 61164547 is a prime.

It is a super-2 number, since 2×61164549² = 7482204108746802, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61164547) 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 11 ways as a sum of consecutive naturals, for example, 4807 + ... + 12059.

It is an arithmetic number, because the mean of its divisors is an integer number (7371273).

Almost surely, 2^61164549 is an apocalyptic number.

It is an amenable number.

61164549 is a deficient number, since it is larger than the sum of its proper divisors (27290727).

61164549 is a wasteful number, since it uses less digits than its factorization.

61164549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8196 (or 8193 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 61164549 is about 7820.7767517044. The cubic root of 61164549 is about 394.0033604461.

The spelling of 61164549 in words is "sixty-one million, one hundred sixty-four thousand, five hundred forty-nine".