61149550 has 72 divisors (see below), whose sum is σ = 144399240. Its totient is φ = 19051200.

The previous prime is 61149533. The next prime is 61149553. The reversal of 61149550 is 5594116.

61149550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61149553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 25816 + ... + 28084.

It is an arithmetic number, because the mean of its divisors is an integer number (2005545).

Almost surely, 2^61149550 is an apocalyptic number.

61149550 is an abundant number, since it is smaller than the sum of its proper divisors (83249690).

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

61149550 is a wasteful number, since it uses less digits than its factorization.

61149550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2306 (or 2294 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 61149550 is about 7819.8177728129. The cubic root of 61149550 is about 393.9711514862.

The spelling of 61149550 in words is "sixty-one million, one hundred forty-nine thousand, five hundred fifty".