61129044 has 18 divisors (see below), whose sum is σ = 154520730. Its totient is φ = 20376336.

The previous prime is 61129043. The next prime is 61129051. The reversal of 61129044 is 44092116.

61129044 is a `hidden beast` number, since 611 + 2 + 9 + 0 + 44 = 666.

It can be written as a sum of positive squares in only one way, i.e., 60652944 + 476100 = 7788^2 + 690^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 61128999 and 61129017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61129043) 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 5 ways as a sum of consecutive naturals, for example, 848979 + ... + 849050.

It is an arithmetic number, because the mean of its divisors is an integer number (8584485).

Almost surely, 2^61129044 is an apocalyptic number.

It is an amenable number.

61129044 is an abundant number, since it is smaller than the sum of its proper divisors (93391686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61129044 is a wasteful number, since it uses less digits than its factorization.

61129044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698039 (or 1698034 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 61129044 is about 7818.5065069999. The cubic root of 61129044 is about 393.9271082313.

The spelling of 61129044 in words is "sixty-one million, one hundred twenty-nine thousand, forty-four".