61019500 has 24 divisors (see below), whose sum is σ = 133267680. Its totient is φ = 24407600.

The previous prime is 61019479. The next prime is 61019503. The reversal of 61019500 is 591016.

61019500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (61019503) 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 7 ways as a sum of consecutive naturals, for example, 60520 + ... + 61519.

It is an arithmetic number, because the mean of its divisors is an integer number (5552820).

Almost surely, 2^61019500 is an apocalyptic number.

It is an amenable number.

61019500 is an abundant number, since it is smaller than the sum of its proper divisors (72248180).

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

61019500 is a wasteful number, since it uses less digits than its factorization.

61019500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122058 (or 122046 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 61019500 is about 7811.4979357355. The cubic root of 61019500 is about 393.6916601228.

The spelling of 61019500 in words is "sixty-one million, nineteen thousand, five hundred".